CVE-2026-12504 — Loytec LINX firmware: Improper Authentication in PAM configuration

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Loytec / LIP-ME20xC	affected 0 through 8.4.16
Loytec / L-INX	affected 0 through 8.4.16
Loytec / L-GATE	affected 0 through 8.4.16
Loytec / L-ROC	affected 0 through 8.4.16
Loytec / L-IOB	affected 0 through 8.4.16
Loytec / L-DALI	affected 0 through 8.4.16
Loytec / L-VIS	affected 0 through 8.4.16
Loytec / L-PAD	affected 0 through 8.4.16

CWE

CWE-287, CWE-521

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.