CVE-2026-77105: CWE-347: Improper Verification of Cryptographic Signature in Commvault Commvault Cloud
Description
CVE-2026-77105 is a high-severity vulnerability in Commvault Commvault Cloud's CommServe component involving improper verification of cryptographic signatures related to privilege management. This flaw could allow an attacker to bypass certain privilege restrictions. The vendor advises upgrading to a resolved maintenance release to address the issue.
CVSS v4.0
Score 8.7high
Affected software
Commvault
Commvault Cloud
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-347) in Commvault Commvault Cloud's CommServe component involves improper verification of cryptographic signatures affecting privilege management. It impacts versions >=11.36.0 <11.36.123, >=11.40.0 <11.40.72, >=11.44.0 <11.44.20, and >=11.46.0 <11.46.20. The CVSS 4.0 base score is 8.7, indicating high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impacts on confidentiality, integrity, and availability. The vendor recommends updating CommServe and Web Server to resolved maintenance releases.
Potential Impact
Successful exploitation could allow an attacker to bypass privilege management controls due to improper cryptographic signature verification, potentially leading to unauthorized access or privilege escalation within affected Commvault Cloud environments.
Mitigation Recommendations
The vendor advises customers to upgrade CommServe and Web Server components to the resolved maintenance releases that fix this vulnerability. No further mitigation guidance is provided, indicating that patching is the primary remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Commvault
- Date Reserved
- 2026-08-20T10:58:02.223Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa0019bacd9273b49a6cf53
Added to database: 09/08/2026, 12:37:47 UTC
Last enriched: 09/16/2026, 02:51:22 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 53
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.