CVE-2026-42781 (GCVE-0-2026-42781)
Vulnerability from cvelistv5 – Published: 2026-05-13 14:12 – Updated: 2026-05-13 16:15
VLAI
EPSS
VEX
Title
BIG-IP FastL4 virtual server vulnerability
Summary
When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 15:59 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000160862 | vendor-advisorypatch |
Impacted products
Date Public
2026-05-13 14:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42781",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-13T15:59:28.041850Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-13T16:15:08.246Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"All Modules"
],
"platforms": [
"r5000 rSeries",
"r10000 rSeries",
"r12000 rSeries",
"BX110 blades on VELOS",
"BX520 blades on VELOS"
],
"product": "BIG-IP",
"vendor": "F5",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "21.1.0",
"versionType": "custom"
},
{
"lessThan": "21.0.0.1",
"status": "affected",
"version": "21.0.0",
"versionType": "custom"
},
{
"lessThan": "17.5.1.4",
"status": "affected",
"version": "17.5.0",
"versionType": "custom"
},
{
"lessThan": "17.1.3.1",
"status": "affected",
"version": "17.1.0",
"versionType": "custom"
},
{
"lessThan": "*",
"status": "unaffected",
"version": "16.1.0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "F5"
}
],
"datePublic": "2026-05-13T14:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eWhen embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\u0026nbsp;\u0026nbsp;\u003c/span\u003eNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
}
],
"value": "When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-13T14:12:31.758Z",
"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
"shortName": "f5"
},
"references": [
{
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://my.f5.com/manage/s/article/K000160862"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "BIG-IP FastL4 virtual server vulnerability",
"x_generator": {
"engine": "F5 SIRTBot v1.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
"assignerShortName": "f5",
"cveId": "CVE-2026-42781",
"datePublished": "2026-05-13T14:12:31.758Z",
"dateReserved": "2026-04-30T23:02:47.666Z",
"dateUpdated": "2026-05-13T16:15:08.246Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-42781",
"date": "2026-09-16",
"epss": "0.00177",
"percentile": "0.07502"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-42781\",\"sourceIdentifier\":\"f5sirt@f5.com\",\"published\":\"2026-05-13T16:16:48.447\",\"lastModified\":\"2026-06-23T13:58:36.387\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\"}],\"affected\":[{\"source\":\"f5sirt@f5.com\",\"affectedData\":[{\"vendor\":\"F5\",\"product\":\"BIG-IP\",\"defaultStatus\":\"unknown\",\"modules\":[\"All Modules\"],\"platforms\":[\"r5000 rSeries\",\"r10000 rSeries\",\"r12000 rSeries\",\"BX110 blades on VELOS\",\"BX520 blades on VELOS\"],\"versions\":[{\"version\":\"21.1.0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"},{\"version\":\"21.0.0\",\"lessThan\":\"21.0.0.1\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"17.5.0\",\"lessThan\":\"17.5.1.4\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"17.1.0\",\"lessThan\":\"17.1.3.1\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"16.1.0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"f5sirt@f5.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"f5sirt@f5.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-13T15:59:28.041850Z\",\"id\":\"CVE-2026-42781\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"f5sirt@f5.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-835\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_access_policy_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F10F963B-348A-4819-9109-EF0F2304CCDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_firewall_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"003B47C5-A8E3-4ECD-B0E1-6FD3BCC6C00A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CCCB38CF-FCDA-4E62-8BEA-70DE61D617B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_analytics:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1489ACC-1DCF-4107-A7A5-12E675B522F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_acceleration_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B63EC396-5C6D-4F2B-AA4B-48C19A2DEF40\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_security_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E8F401DC-AEE8-4DA1-8D54-51086557F0CC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB3D5211-78EA-479C-A468-F3DD867DA377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_automation_toolchain:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4BF32E2A-2837-4F02-98D4-EC8D4AD7629A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_carrier-grade_nat:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7918553F-3A00-4F1F-8007-40C440D30EDC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_container_ingress_services:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"63F0B2DD-6D9C-4A4E-AB9A-E417D0BA9725\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"961FD6A4-3969-4A7B-B154-71AB91102EDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_domain_name_system:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0EA3A0ED-753C-4909-8EDC-294AF6873791\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_edge_gateway:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B22E4040-EC36-44B7-AE6F-D8A5B982350F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_fraud_protection_service:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"90819202-D6CE-4742-957E-32653AD75AB2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_global_traffic_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5E4DCF86-3120-4D11-8233-9E41BF6F1577\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_link_controller:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C3978168-BE6E-41DB-92A2-99843137BBFC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_local_traffic_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BBB888F-2AAF-4F90-82F7-12A79A5D9EC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_policy_enforcement_manager:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EA18854A-929E-4D5E-B2EC-9AC31A5694C6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ssl_orchestrator:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AB4EFA9A-FBB9-437C-9789-7C4EB489DD59\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_webaccelerator:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"900D8242-3139-443E-98A3-30A7D9A0CA42\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_websafe:21.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DF82E2E-B438-4205-8A58-802A1F22EB3E\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"84ACD36F-E97D-4DDA-A8FD-D911095C1035\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"BD71EC53-8ABC-410F-B031-0B3288D2E8DF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"1E446AEE-1CB7-411C-9549-0E12C2EBBF9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"AFDDB2A2-3B00-4454-A5BA-F181972B8B70\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"D186FF46-E0B0-4B54-9EA9-87AD379FA600\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"4AFFB39F-3E07-4316-9DD6-C36407B09C20\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"06CB53ED-B0CF-45D0-BF6B-C07C2B5AD3DA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"A6E75F5E-8C80-4287-84BF-6676B1029AA6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"2F330E98-E773-4D93-855D-1D82644B3F73\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"26D5B297-AAD7-4DF5-9C24-E9550DF2793A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"59042348-3748-48E0-B78B-D978C6B241B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"5082DEBB-5C7F-41A2-B48F-0C72C3A6782B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"B010CF79-60CD-4B4C-BDCA-61FBD59397B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"39AA59D4-6DE8-4ABA-9EEB-840755CA76A2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_automation_toolchain:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"6C89D1A8-D453-4A12-97EA-6642F98FDA27\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_automation_toolchain:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"83FBED4E-1977-45EF-8D33-4A24D81BFE7C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"54BB0364-2EFA-442B-9DB2-3A49677D965C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"F64237A9-9AF0-4D01-958F-753862C33ABF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_container_ingress_services:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"2727CEE5-75FD-4345-88C1-3ED60AAF7DE3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_container_ingress_services:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"205B3D36-A3D8-4859-A3C4-2FA432B4A162\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"EA180633-8625-4F8E-90E2-235BCD334256\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"66DDBE6D-423A-4F60-9D06-0E10CB93FB66\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"35FF40AC-3A3E-4B4B-83F4-BB6048FEBB72\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"E0B21289-FB5C-47FA-B054-50341236260D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"C83BE4EC-8775-4FF4-B362-9E6EBDD53A04\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"C7F7C488-8C01-4EE7-A244-259237F06668\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"556AEFC8-8D4C-4E5A-9051-77424FAAC9D1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"E649795C-1B70-411B-B744-E0728109474D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"93597117-087D-4AAC-884F-8E1400D645FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"131D329E-0351-402B-BC67-698DC1C9A83E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"2F95824A-E1F8-412E-B59D-8278AE3CB571\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"C8EF0B1D-AE26-4283-8D84-5CECB245652F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"4996DCE3-8F39-4917-96A0-2C44C900DEE0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"AA1487CA-A5F3-4689-9458-7309C2E17C9E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"48DBF1EA-4DFD-402F-81BC-430B7D74C5FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"7F234CDF-C413-4E70-9A97-6467ADB33EA9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"BA32DFFC-6412-4BA9-9382-5E307539AF4D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"BCBD1B79-3FC1-4288-BEF8-E5D60DA939A6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"D25B01D7-F665-47EE-9185-40581A6C3DA0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"83AD64DE-7D0B-4380-89E0-A06817B21606\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.1.0\",\"versionEndIncluding\":\"17.1.3\",\"matchCriteriaId\":\"4AE71FB5-6842-4822-9CA4-1427BC9187BF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.5.0\",\"versionEndIncluding\":\"17.5.1\",\"matchCriteriaId\":\"F1516CC2-94CA-4FB2-AC5A-6CFB0580980C\"}]}]}],\"references\":[{\"url\":\"https://my.f5.com/manage/s/article/K000160862\",\"source\":\"f5sirt@f5.com\",\"tags\":[\"Mitigation\",\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-06-05T19:15:53+00:00",
"cve": "CVE-2026-42781",
"id": "CVE-2026-42781",
"initial_release_date": "2026-05-13T14:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "BIG-IP FastL4 virtual server vulnerability",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42781.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-42781\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-13T15:59:28.041850Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-13T16:15:01.301Z\"}}], \"cna\": {\"title\": \"BIG-IP FastL4 virtual server vulnerability\", \"source\": {\"discovery\": \"INTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"F5\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.1, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"ADJACENT\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"F5\", \"modules\": [\"All Modules\"], \"product\": \"BIG-IP\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"21.1.0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"21.0.0\", \"lessThan\": \"21.0.0.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"17.5.0\", \"lessThan\": \"17.5.1.4\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"17.1.0\", \"lessThan\": \"17.1.3.1\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"16.1.0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"platforms\": [\"r5000 rSeries\", \"r10000 rSeries\", \"r12000 rSeries\", \"BX110 blades on VELOS\", \"BX520 blades on VELOS\"], \"defaultStatus\": \"unknown\"}], \"datePublic\": \"2026-05-13T14:00:00.000Z\", \"references\": [{\"url\": \"https://my.f5.com/manage/s/article/K000160862\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"x_generator\": {\"engine\": \"F5 SIRTBot v1.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\\u00a0\\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eWhen embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\u0026nbsp;\u0026nbsp;\u003c/span\u003eNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-835\", \"description\": \"CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab\", \"shortName\": \"f5\", \"dateUpdated\": \"2026-05-13T14:12:31.758Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-42781\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-13T16:15:08.246Z\", \"dateReserved\": \"2026-04-30T23:02:47.666Z\", \"assignerOrgId\": \"9dacffd4-cb11-413f-8451-fbbfd4ddc0ab\", \"datePublished\": \"2026-05-13T14:12:31.758Z\", \"assignerShortName\": \"f5\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…