Out-of-Bounds Write Vulnerability in Commvault Products from Commvault
CVE-2026-77094

7.1HIGH

Key Information:

Vendor

Commvault

Status
Commvault Cloud
Vendor
CVE Published:
13 October 2026

What is CVE-2026-77094?

Commvault Software suffers from an out-of-bounds write vulnerability that can impact service availability. Users are strongly advised to upgrade to the maintenance release to mitigate risks. This vulnerability affects various Commvault components, including CommServe, Webserver, Command Center, MediaAgents, Clients, and HyperScale. To ensure the integrity and security of your installations, prompt updates are necessary.

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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