Stack-Based Buffer Overflow in CommVault's QAPI Affecting Service Availability
CVE-2026-97333

7.1HIGH

Key Information:

Vendor

Commvault

Status
Commvault Cloud
Vendor
CVE Published:
13 October 2026

What is CVE-2026-97333?

The QAPI component of CommVault's software is impacted by a stack-based buffer overflow that may lead to service disruptions. Customers are advised to upgrade to the latest maintenance release to mitigate risks associated with this vulnerability. Ensure all instances of the CommServe, Web Server, Command Center, and Index Server are updated promptly to maintain service integrity and security.

Affected Version(s)

Commvault Cloud Windows 11.46.0 <= 11.46.29

Commvault Cloud Windows 11.44.0 <= 11.44.24

Commvault Cloud Windows 11.40.0 <= 11.40.77

References

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

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
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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