CVE-2026-77089: CWE-290: Authentication Bypass by Spoofing in Commvault Commvault Cloud
Description
CVE-2026-77089 is an authentication bypass vulnerability in the Command Center API of Commvault Cloud. It affects privilege management by allowing unauthorized access through spoofing. The issue is resolved in maintenance releases, and users are advised to update the Command Center software accordingly. The vulnerability has a critical severity rating with a CVSS score of 9.3.
CVSS v4.0
Score 9.3critical
Affected software
Commvault
Commvault Cloud
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Command Center API in Commvault Cloud contains an authentication bypass vulnerability (CWE-290) that allows attackers to bypass authentication controls affecting privilege management. This flaw enables unauthorized access without requiring user interaction or privileges. The vulnerability affects multiple versions of Commvault Cloud prior to specific maintenance releases. Users should upgrade to the resolved maintenance releases to mitigate the issue.
Potential Impact
Successful exploitation of this vulnerability allows attackers to bypass authentication mechanisms, potentially gaining unauthorized privileged access to the Commvault Cloud Command Center. This could lead to unauthorized management actions within the affected system. The vulnerability is rated critical with a CVSS 4.0 score of 9.3, indicating high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available through resolved maintenance releases. Users should upgrade their Commvault Cloud Command Center installations to the latest maintenance releases that address this authentication bypass issue. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Commvault
- Date Reserved
- 2026-08-20T10:56:18.889Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa00199acd9273b49a6cf10
Added to database: 09/08/2026, 12:37:45 UTC
Last enriched: 09/16/2026, 02:44:39 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 97
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