GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-77102 (GCVE-0-2026-77102)

Vulnerability from cvelistv5 – Published: 2026-09-08 12:12 – Updated: 2026-09-08 13:25
VLAI
Title
CommServe Denial of Service
Summary
CommServe contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 13:24 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version CPE status
Commvault Commvault Cloud Affected: 11.46.0 , ≤ 11.46.19 (custom)
Affected: 11.44.0 , ≤ 11.44.19 (custom)
Affected: 11.40.0 , ≤ 11.40.71 (custom)
Affected: 11.36.0 , ≤ 11.36.122 (custom)
guessed Create a notification for this product.
Credits
Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77102",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T13:24:19.978501Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-122",
                "description": "CWE-122 Heap-based Buffer Overflow",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T13:25:21.705Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "platforms": [
            "Windows",
            "Linux"
          ],
          "product": "Commvault Cloud",
          "vendor": "Commvault",
          "versions": [
            {
              "changes": [
                {
                  "at": "11.46.20",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "11.46.19",
              "status": "affected",
              "version": "11.46.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "11.44.20",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "11.44.19",
              "status": "affected",
              "version": "11.44.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "11.40.72",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "11.40.71",
              "status": "affected",
              "version": "11.40.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "11.36.123",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "11.36.122",
              "status": "affected",
              "version": "11.36.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "CommServe contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-08T12:12:54.281Z",
        "orgId": "050066fd-a2f9-4f32-ab5d-4c53f48bc333",
        "shortName": "Commvault"
      },
      "references": [
        {
          "url": "https://documentation.commvault.com/securityadvisories/CV_2026_08_4.html"
        }
      ],
      "title": "CommServe Denial of Service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "050066fd-a2f9-4f32-ab5d-4c53f48bc333",
    "assignerShortName": "Commvault",
    "cveId": "CVE-2026-77102",
    "datePublished": "2026-09-08T12:12:54.281Z",
    "dateReserved": "2026-08-20T10:57:52.110Z",
    "dateUpdated": "2026-09-08T13:25:21.705Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-77102",
      "date": "2026-09-16",
      "epss": "0.00267",
      "percentile": "0.18929"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-77102\",\"sourceIdentifier\":\"050066fd-a2f9-4f32-ab5d-4c53f48bc333\",\"published\":\"2026-09-08T13:17:25.987\",\"lastModified\":\"2026-09-09T15:55:47.400\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"CommServe contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.\"}],\"affected\":[{\"source\":\"050066fd-a2f9-4f32-ab5d-4c53f48bc333\",\"affectedData\":[{\"vendor\":\"Commvault\",\"product\":\"Commvault Cloud\",\"defaultStatus\":\"unknown\",\"platforms\":[\"Windows\",\"Linux\"],\"versions\":[{\"version\":\"11.46.0\",\"lessThanOrEqual\":\"11.46.19\",\"versionType\":\"custom\",\"status\":\"affected\",\"changes\":[{\"at\":\"11.46.20\",\"status\":\"unaffected\"}]},{\"version\":\"11.44.0\",\"lessThanOrEqual\":\"11.44.19\",\"versionType\":\"custom\",\"status\":\"affected\",\"changes\":[{\"at\":\"11.44.20\",\"status\":\"unaffected\"}]},{\"version\":\"11.40.0\",\"lessThanOrEqual\":\"11.40.71\",\"versionType\":\"custom\",\"status\":\"affected\",\"changes\":[{\"at\":\"11.40.72\",\"status\":\"unaffected\"}]},{\"version\":\"11.36.0\",\"lessThanOrEqual\":\"11.36.122\",\"versionType\":\"custom\",\"status\":\"affected\",\"changes\":[{\"at\":\"11.36.123\",\"status\":\"unaffected\"}]}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"050066fd-a2f9-4f32-ab5d-4c53f48bc333\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/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\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"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\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-08T13:24:19.978501Z\",\"id\":\"CVE-2026-77102\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-122\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.36.0\",\"versionEndExcluding\":\"11.36.123\",\"matchCriteriaId\":\"7D5E9F88-DDA2-4F7E-96C8-63CE8AACF381\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.40.0\",\"versionEndExcluding\":\"11.40.72\",\"matchCriteriaId\":\"F195D789-6414-4A1F-B6B2-E21035032D0A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.44.0\",\"versionEndExcluding\":\"11.44.20\",\"matchCriteriaId\":\"43942B05-3043-419D-BE53-4BC30CECB734\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.46.0\",\"versionEndExcluding\":\"11.46.20\",\"matchCriteriaId\":\"1D16402F-8EBF-42ED-BC4A-8053736561D4\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A2572D17-1DE6-457B-99CC-64AFD54487EA\"}]}]}],\"references\":[{\"url\":\"https://documentation.commvault.com/securityadvisories/CV_2026_08_4.html\",\"source\":\"050066fd-a2f9-4f32-ab5d-4c53f48bc333\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-77102\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-08T13:24:19.978501Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-122\", \"description\": \"CWE-122 Heap-based Buffer Overflow\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-08T13:25:17.902Z\"}}], \"cna\": {\"title\": \"CommServe Denial of Service\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase.\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Commvault\", \"product\": \"Commvault Cloud\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"11.46.20\", \"status\": \"unaffected\"}], \"version\": \"11.46.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"11.46.19\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"11.44.20\", \"status\": \"unaffected\"}], \"version\": \"11.44.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"11.44.19\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"11.40.72\", \"status\": \"unaffected\"}], \"version\": \"11.40.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"11.40.71\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"11.36.123\", \"status\": \"unaffected\"}], \"version\": \"11.36.0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"11.36.122\"}], \"platforms\": [\"Windows\", \"Linux\"], \"defaultStatus\": \"unknown\"}], \"references\": [{\"url\": \"https://documentation.commvault.com/securityadvisories/CV_2026_08_4.html\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"CommServe contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-122: Heap-based Buffer Overflow\"}]}], \"providerMetadata\": {\"orgId\": \"050066fd-a2f9-4f32-ab5d-4c53f48bc333\", \"shortName\": \"Commvault\", \"dateUpdated\": \"2026-09-08T12:12:54.281Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-77102\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-08T13:25:21.705Z\", \"dateReserved\": \"2026-08-20T10:57:52.110Z\", \"assignerOrgId\": \"050066fd-a2f9-4f32-ab5d-4c53f48bc333\", \"datePublished\": \"2026-09-08T12:12:54.281Z\", \"assignerShortName\": \"Commvault\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.