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CVE-2026-77089 Commvault CVE debrief

CVE-2026-77089 is a critical authentication bypass issue affecting privilege management in the Command Center API. Commvault customers are advised to upgrade to a resolved maintenance release. The CVE record was published on 2026-09-08T13:17:25.227Z and was last modified on 2026-09-11T14:25:43.913Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 9.3 and is classified as CRITICAL. Affected versions include 11.36.0 to 11.36.123, 11.40.0 to 11.40.72, 11.44.0 to 11.44.20, and 11.46.0 to 11.46.20. Commvault customers and administrators responsible for privilege management in Command Center API should assess exposure and prioritize remediation.

Vendor
Commvault
Product
Commvault Cloud
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-11
Advisory published
2026-09-08
Advisory updated
2026-09-11

Who should care

Commvault customers and administrators responsible for privilege management in Command Center API should assess exposure and prioritize remediation.

Why it matters

CVE-2026-77089 is a critical authentication bypass issue affecting privilege management in the Command Center API. Commvault customers should assess exposure, prioritize remediation, and monitor for potential exploitation attempts.

  • Potential unauthorized access to sensitive data
  • Possible elevation of privileges
  • Required verification of affected versions and remediation status
  • Need for monitoring and detection of potential exploitation attempts

Technical summary

The Command Center API contains an authentication bypass issue affecting privilege management. The issue has a CVSS score of 9.3 and is classified as CRITICAL. The vulnerability affects multiple versions of Commvault, including 11.36.0 to 11.36.123, 11.40.0 to 11.40.72, 11.44.0 to 11.44.20, and 11.46.0 to 11.46.20.

Defensive priority

High

Recommended defensive actions

  • Upgrade to a resolved maintenance release
  • Review and update privilege management in Command Center API
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD detail page provide information on the authentication bypass issue in the Command Center API. The vendor advisory from Commvault provides additional context on the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-77089 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-77089

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-77089 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-77089

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://documentation.commvault.com/securityadvisories/CV_2026_07_1.html

    050066fd-a2f9-4f32-ab5d-4c53f48bc333 - Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.