CVE-2026-27842 Auth bypass in MR-GM5A-L1
An attacker can bypass authentication to modify device configuration on Micro Research MR-GM5L-S1 and MR-GM5A-L1 devices.
- 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-2026-27842?
CVE-2026-27842 is a critical authentication bypass vulnerability in Micro Research Ltd. MR-GM5A-L1, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device configuration.
Weakness: CWE-288
Which versions are affected by CVE-2026-27842?
How do I fix CVE-2026-27842?
No fix has been published for CVE-2026-27842 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-27842 being exploited?
There is no known exploitation of CVE-2026-27842 in the wild and no public exploit code.
Sources
Also known as GHSA-2m33-h63p-wx98.