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PatchSiren cyber security CVE debrief

CVE-2026-77089 Commvault CVE debrief

CVE-2026-77089 is a critical authentication bypass issue affecting privilege management in Commvault Cloud's Command Center API. The issue has a CVSS score of 9.3 and is considered critical. Commvault customers are advised to upgrade to a resolved maintenance release. This vulnerability allows for unauthorized access to the Command Center API, potentially leading to privilege management issues. It requires immediate attention from administrators and users to assess their exposure and take necessary actions to mitigate the vulnerability. The CVE record and NVD entry provide details on the authentication bypass issue in Commvault Cloud's Command Center API.

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 Cloud administrators and users who have access to the Command Center API should assess their exposure and take necessary actions to mitigate the vulnerability.

Why it matters

CVE-2026-77089 is a critical authentication bypass issue in Commvault Cloud's Command Center API that requires immediate attention from administrators and users. The vulnerability has a CVSS score of 9.3 and can lead to privilege management issues if not addressed.

  • Potential unauthorized access to the Command Center API
  • Privilege management issues due to authentication bypass
  • Need for urgent upgrade to a resolved maintenance release

Technical summary

The CVE-2026-77089 vulnerability is an authentication bypass issue affecting the Command Center API in Commvault Cloud. This issue has a CVSS score of 9.3 and is considered critical. The vulnerability allows for unauthorized access to the Command Center API, potentially leading to privilege management issues.

Defensive priority

High

Recommended defensive actions

  • Upgrade to a resolved maintenance release of Commvault Cloud
  • Review and update access controls for the Command Center API
  • Monitor for suspicious activity on the Command Center API

Evidence notes

The CVE record and NVD entry provide details on the authentication bypass issue in Commvault Cloud's Command Center API. The vendor advisory is available from Commvault's security advisories page.

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.