Vulnerability · Published Feb 25, 2026 · Assigned by ENISA

CVE-2026-27849Missing neutralization in Linksys MR9600, Linksys MX4200

Critical 9.8

In plain English

A critical-severity OS command injection in MR9600 from Linksys. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.4%top 69.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Due to missing neutralization of special elements, OS commands can be injected via the update functionality of a TLS-SRP connection, which is normally used for configuring devices inside the mesh network. This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.

Affected products (as reported)

Vendor	Product	Versions
Linksys	MR9600	1.0.4.205530
Linksys	MX4200	1.0.13.210200

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-011.txt third-party-advisory, technical-description