CVE-2026-27848 Missing neutralization in Linksys MR9600, Linksys MX4200
Attackers can inject OS commands via TLS-SRP handshake to execute arbitrary code as root on Linksys MR9600 and MX4200 routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-27848?
CVE-2026-27848 is a critical command injection vulnerability in Linksys MR9600, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Due to missing neutralization of special elements, OS commands can be injected via the handshake of a TLS-SRP connection, which are ultimately run as the root user. This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.
Weakness: CWE-78
Which versions are affected by CVE-2026-27848?
How do I fix CVE-2026-27848?
No fix has been published for CVE-2026-27848 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-27848 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27848 exists.
Sources
Also known as GHSA-qc7c-4556-qm66.