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Vulnerability record · CVE-2026-12504 · published 24 July 2026

CVE-2026-12504: Improper authentication vulnerability

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.

8.4 CVSS 4.0 High EPSS 0.19% · top 92.6% CWE-287 · Improper authenticationCWE-521 · Weak password requirements Deferred
8.4CVSS 4.0 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
27 Jul 2026Last modified by NVD

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.

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:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-12504), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.