# CVE-2026-77093: Commvault CvFWD integer overflow denial of service

Source: https://junglewise.ai/threats/cve-2026-77093-cvfwd-contained-an-integer-overflow-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-2026-77093 · Severity: info · Published 2026-10-13

Commvault's data management and backup software contains an integer overflow flaw in the CvFWD component that can crash the service, disrupting backup and recovery operations. An attacker with network access can trigger this condition to cause a denial of service, preventing customers from protecting or recovering their data.

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

## Quick answers

**Is CVE-2026-77093 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77093 being exploited in the wild.

**How severe is CVE-2026-77093?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Commvault 11.36.0-11.36.126, 11.40.0-11.40.77, 11.44.0-11.44.24, 11.46.0-11.46.29.

**Is there a fix for CVE-2026-77093?** 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-2026-77093 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-77093?** 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 integer overflow vulnerability exists in Commvault's CvFWD (Command Center Forwarding) component that leads to denial of service. The vulnerability affects multiple versions of Commvault across Linux and Windows platforms and can be triggered over the network. Commvault has released patched maintenance versions that resolve the issue.

## Affected products

- Commvault Commvault 11.36.0-11.36.126, 11.40.0-11.40.77, 11.44.0-11.44.24, 11.46.0-11.46.29

## Timeline

- 2026-10-13: disclosed
- 2026-10-13: advisory

## References

- [https://documentation.commvault.com/securityadvisories/CV_2026_10_2.html](https://documentation.commvault.com/securityadvisories/CV_2026_10_2.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 out-of-bounds write denial of service](https://junglewise.ai/threats/cve-2026-77094-cvfwd-contained-an-out-of-bounds-write-affecting-service)