CVE-2026-12504

HIGH

Loytec LINX firmware: Improper Authentication in PAM configuration

Title source: cna

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.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

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

Scores

CVSS v4 8.4

EPSS 0.0013

EPSS Percentile 2.9%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-287 CWE-521

Status published

Products (8)

Loytec/L-DALI < 8.4.16

Loytec/L-GATE < 8.4.16

Loytec/L-INX < 8.4.16

Loytec/L-IOB < 8.4.16

Loytec/L-PAD < 8.4.16

Loytec/L-ROC < 8.4.16

Loytec/L-VIS < 8.4.16

Loytec/LIP-ME20xC < 8.4.16

Published Jul 24, 2026

Tracked Since Jul 24, 2026