CVE-2026-27849 is a critical OS command injection vulnerability (CWE-78) affecting Linksys MR9600 (1.0.4.205530) and MX4200 (1.0.13.210200) mesh network devices. Attackers can inject OS commands through the update functionality of a TLS-SRP connection due to missing neutralization of special elements. This vulnerability carries a CVSSv3.1 score of 9.8 (CRITICAL), indicating a network-based attack with low complexity, requiring no privileges or user interaction, and leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion, suggesting awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Linksys | MR9600 | 1.0.4.205530CNA affecteddefault affected | |
| Linksys | MX4200 | 1.0.13.210200CNA affecteddefault unaffected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.