Vulnerability · Published Jul 24, 2026 · Assigned by NCSC.ch

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

High 8.4

In plain English

A high-severity improper authentication in L-DALI from Loytec. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 4.0)8.4High

Exploit odds (30 days)0.2%top 91.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Loytec	LIP-ME20xC	0 – through 8.4.16
Loytec	L-INX	0 – through 8.4.16
Loytec	L-GATE	0 – through 8.4.16
Loytec	L-ROC	0 – through 8.4.16
Loytec	L-IOB	0 – through 8.4.16
Loytec	L-DALI	0 – through 8.4.16
Loytec	L-VIS	0 – through 8.4.16
Loytec	L-PAD	0 – through 8.4.16

Weakness: CWE-287, CWE-521 · Vector: 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

References

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