# CVE-2026-77094: Commvault CvFWD out-of-bounds write denial of service

Source: https://junglewise.ai/threats/cve-2026-77094-cvfwd-contained-an-out-of-bounds-write-affecting-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-77094 · Severity: info · Published 2026-10-13

Commvault backup and recovery software contains an out-of-bounds write vulnerability in the CvFWD component. An attacker can trigger this flaw to crash the backup service, causing loss of availability for critical backup and recovery operations across an organization's infrastructure.

Technologies: [Commvault](https://junglewise.ai/threats/technologies/commvault). Vendors: [Commvault](https://junglewise.ai/threats/vendors/commvault).

## Quick answers

**Is CVE-2026-77094 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77094 being exploited in the wild.

**How severe is CVE-2026-77094?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Commvault 11.36.0–11.46.29.

**Is there a fix for CVE-2026-77094?** Yes: fixed in Commvault 11.36.127 and higher, 11.40.78 and higher, 11.44.25 and higher, 11.46.30 and higher. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-77094 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-77094?** Check whether you run Commvault at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Commvault 11.36.127 and higher, 11.40.78 and higher, 11.44.25 and higher, 11.46.30 and higher

## Technical details

An out-of-bounds write exists in Commvault's CvFWD component affecting versions 11.36.0–11.46.29 across Linux and Windows platforms. The vulnerability requires no authentication and impacts service availability; successful exploitation causes a denial of service by crashing the affected component. Patches are available for all affected version branches.

## Affected products

- Commvault Commvault 11.36.0–11.46.29

## Timeline

- 2026-10-13: disclosed

## References

- [https://documentation.commvault.com/securityadvisories/CV_2026_10_1.html](https://documentation.commvault.com/securityadvisories/CV_2026_10_1.html)

## Related threats

- [Commvault network messaging layer decompression resource exhaustion](https://junglewise.ai/threats/cve-2026-97334-the-network-messaging-layer-contained-improper-handling-of-highly)
- [Commvault QAPI stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-97333-qapi-contained-a-stack-based-buffer-overflow-affecting-service)
- [Commvault CVFS missing authentication in command execution](https://junglewise.ai/threats/cve-2026-77096-cvfs-contained-a-missing-authentication-condition-affecting)
- [Commvault null pointer dereference in CvFWD](https://junglewise.ai/threats/cve-2026-77095-cvfwd-contained-a-null-pointer-dereference-affecting-service)
- [Commvault CvFWD integer overflow denial of service](https://junglewise.ai/threats/cve-2026-77093-cvfwd-contained-an-integer-overflow-affecting-service)