CVE-2025-5090 (GCVE-0-2025-5090)
Vulnerability from cvelistv5 – Published: 2026-06-05 15:49 – Updated: 2026-06-05 15:49
VLAI
Title
Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages
Summary
CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.
Severity
CWE
- CWE-20 - Improper Input Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS / CloudVision eXchange (CVX) |
Affected:
4.34.0F , ≤ 4.34.1F
(custom)
Affected: 4.33.0M , ≤ 4.33.4M (custom) Affected: 4.32.0M , ≤ 4.32.6M (custom) Affected: 4.31.0 , < 4.32.0 (custom) Affected: 4.30.0 , < 4.31.0 (custom) |
Date Public
2025-11-18 16:46
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"CloudVision eXchange",
"virtual or physical appliance"
],
"product": "EOS / CloudVision eXchange (CVX)",
"vendor": "Arista Networks",
"versions": [
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"status": "affected",
"version": "4.34.0F",
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{
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"status": "affected",
"version": "4.33.0M",
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"status": "affected",
"version": "4.32.0M",
"versionType": "custom"
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{
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"status": "affected",
"version": "4.31.0",
"versionType": "custom"
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{
"lessThan": "4.31.0",
"status": "affected",
"version": "4.30.0",
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"configurations": [
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"lang": "en",
"supportingMedia": [
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"value": "\u003cp\u003eIn order to be vulnerable to CVE-2025-5090, the following condition must be met: CVX must be configured:\u003c/p\u003e\n\u003cpre\u003e\u003ccode\u003ecvx1#show cvx\n Status: Enabled\n Mode: Standalone\n Heartbeat interval: 20.0\n Heartbeat timeout: 60.0\n Client connection state preserving: Disabled\n \ncvx1#show running-config section cvx\ncvx\n no shutdown\u003c/code\u003e\u003c/pre\u003e"
}
],
"value": "In order to be vulnerable to CVE-2025-5090, the following condition must be met: CVX must be configured:\n\n\n\n\ncvx1#show cvx\n Status: Enabled\n Mode: Standalone\n Heartbeat interval: 20.0\n Heartbeat timeout: 60.0\n Client connection state preserving: Disabled\n \ncvx1#show running-config section cvx\ncvx\n no shutdown"
}
],
"datePublic": "2025-11-18T16:46:00.000Z",
"descriptions": [
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"lang": "en",
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"value": "\u003cp\u003eCVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.\u003c/p\u003e"
}
],
"value": "CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX."
}
],
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/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": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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": [
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"lang": "en",
"value": "GENERAL"
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"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
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}
],
"providerMetadata": {
"dateUpdated": "2026-06-05T15:49:27.770Z",
"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
"shortName": "Arista"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126"
}
],
"solutions": [
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"lang": "en",
"supportingMedia": [
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"value": "\u003cp\u003eThe recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:\u003c/p\u003e\n\u003cul\u003e\n \u003cli\u003e4.34.2F and later releases in the 4.34.x train\u003c/li\u003e\n \u003cli\u003e4.33.5M and later releases in the 4.33.x train\u003c/li\u003e\n \u003cli\u003e4.32.7M and later releases in the 4.32.x train\u003c/li\u003e\n\u003c/ul\u003e"
}
],
"value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:\n\n\n\n * 4.34.2F and later releases in the 4.34.x train\n\n * 4.33.5M and later releases in the 4.33.x train\n\n * 4.32.7M and later releases in the 4.32.x train"
}
],
"source": {
"advisory": "0126",
"defect": [
"BUG1139764"
],
"discovery": "INTERNAL"
},
"title": "Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages",
"workarounds": [
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"lang": "en",
"supportingMedia": [
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"value": "\u003cp\u003eThere is no mitigation for this issue.\u003c/p\u003e"
}
],
"value": "There is no mitigation for this issue."
}
],
"x_capecAlignment": {
"capecId": "CAPEC-125",
"capecName": "Flooding / Malformed Packet",
"justification": "An attacker with high privilege access over a downstream switch can emit unexpected or malformed TCP packets causing state management code on CVX (ControllerOob/Controllerdb) to throw unhandled faults, leading to ongoing client deregistration cycles and cluster instability."
},
"x_generator": {
"engine": "Vulnogram"
}
}
},
"cveMetadata": {
"assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
"assignerShortName": "Arista",
"cveId": "CVE-2025-5090",
"datePublished": "2026-06-05T15:49:27.770Z",
"dateReserved": "2025-05-22T16:26:48.444Z",
"dateUpdated": "2026-06-05T15:49:27.770Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-5090",
"date": "2026-06-08",
"epss": "0.00044",
"percentile": "0.13764"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-5090\",\"sourceIdentifier\":\"psirt@arista.com\",\"published\":\"2026-06-05T17:16:30.347\",\"lastModified\":\"2026-06-05T19:03:48.933\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"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\":\"psirt@arista.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"references\":[{\"url\":\"https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126\",\"source\":\"psirt@arista.com\"}]}}"
}
}
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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.
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