CVE-2026-12504

Loytec LINX firmware: Improper Authentication in PAM configuration

State: Published
Severity: 8.4 High
Published: Jul 24, 2026
Updated: Jul 24, 2026
Reserved: Jun 17, 2026

Description

Improper Authentication (CWE-287) in the PAM configuration in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	NCSC.ch

Weaknesses

CWE-287 Improper authentication
CWE-521 Weak password requirements

Affected Products

Product	Versions
LIP-ME20xCLoytec	8.4.16 and earlierAffected
L-INXLoytec	8.4.16 and earlierAffected
L-GATELoytec	8.4.16 and earlierAffected
L-ROCLoytec	8.4.16 and earlierAffected
L-IOBLoytec	8.4.16 and earlierAffected
L-DALILoytec	8.4.16 and earlierAffected
L-VISLoytec	8.4.16 and earlierAffected
L-PADLoytec	8.4.16 and earlierAffected

References

https://www.loytec.com/support/product-security/advisories/8521-dibt-cve-20260526-0003-pam-passwordless-uid-0-authentication-highvendor-advisory

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