Cryptographic Signature Verification Issue in CommServe by Commvault
CVE-2026-77105

8.7HIGH

Key Information:

Vendor

Commvault

Status
Commvault Cloud
Vendor
CVE Published:
8 September 2026

What is CVE-2026-77105?

CommServe has a vulnerability that involves improper cryptographic signature verification, which can impact privilege management within the system. This issue necessitates users of the software to upgrade to a resolved maintenance release for enhanced security. It is crucial for software customers to promptly update both CommServe and Web Server to mitigate possible risks associated with this vulnerability.

Affected Version(s)

Commvault Cloud Windows 11.46.0 <= 11.46.19

Commvault Cloud Windows 11.44.0 <= 11.44.19

Commvault Cloud Windows 11.40.0 <= 11.40.71

References

https://documentation.commvault.com/securityadvisories/CV...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase.
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