RCE in Linksys E5350
CVE-2026-121932
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Linksys E5350 — versions 1.0.00.037
Weakness classification (CWE)
References
- github.com/Zimo-666/E5350-cves/tree/main/01-wizard-preauth-command-injection (exploit)
- CVE-2026-121932 | CVE Analysis and Report (third-party-advisory)
- Submit #1024275 | Linksys E5350 1.0.00.037 Missing Authentication / OS Command Injection (CWE-306 / CWE-78) (third-party-advisory)
- Submit #1024277 | Linksys E5350 1.0.00.037 OS Command Injection (CWE-78) (Duplicate) (third-party-advisory)
- VDB-431044 | Linksys E5350 apply.cgi system os command injection (technical-description, vdb-entry)
- VDB-431044 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- www.linksys.com/ (product)
Frequently asked questions
- What is CVE-2026-121932?
- CVE-2026-121932 is a critical-severity vulnerability in Linksys E5350, classified under Command Injection. CVSS score: 10.0/10. Published 2026-11-04.
- How severe is CVE-2026-121932?
- Critical severity. CVSS v3 base score is 10.0 out of 10.