CVE-2026-12504highCWE-287CWE-521

CVE-2026-12504: high-severity vulnerability in Loytec L-INX

Loytec LINX firmware: Improper Authentication in PAM configuration

Published

Follow this CVE+ Monitor L-DALI+ Monitor L-GATE

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.4epss 0.2%
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
Affected products
Loytec · L-DALILoytec · L-GATELoytec · L-INXLoytec · L-IOBLoytec · LIP-ME20xCLoytec · L-PADLoytec · L-ROCLoytec · L-VIS
Related CVEs — Loytec L-INX

In the same product, most dangerous first.

CVE-2026-12496HIGHLoytec LINX firmware: Unauthenticated stored XSS in OPC XML-DA serverEPSS 0.6%CVE-2026-55732HIGHLoytec LINX firmware: Out-of-bounds Read in BACnet packet parsing (bacdt_datetime_to_tod)EPSS 0.5%CVE-2026-55731MEDIUMLoytec LINX firmware: Unchecked input for loop condition in the SNMP agentEPSS 0.5%CVE-2026-12503CRITICALLoytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starterEPSS 0.2%CVE-2026-55728LOWLoytec LINX firmware: Stack-based Buffer Overflow in cmd_ipaddr_conflictEPSS 0.2%CVE-2026-12502HIGHLoytec LINX firmware: Improper Privilege Management in /usr/bin/ltsudoEPSS 0.2%