CVE-2026-27842

State: Published
Severity: 9.3 Critical
Published: Mar 11, 2026
Updated: Mar 11, 2026
Reserved: Mar 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	jpcert
3.0	9.8 Critical	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	jpcert

Weaknesses

CWE-288 Authentication Bypass Using an Alternate Path or Channel

Affected Products

Product	Versions
MR-GM5L-S1Micro Research Ltd.	firmware versions prior to v2.01.04N1_02Affected
MR-GM5A-L1Micro Research Ltd.	firmware versions prior to v2.01.04N1_02Affected

References

https://www.mrl.co.jp/download/security/JVNVU98103854.pdf
https://jvn.jp/en/vu/JVNVU98103854/

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