CVE-2026-12504 PUBLISHED

Loytec LINX firmware: Improper Authentication in PAM configuration

Assigner: NCSC.ch
Reserved: 17.06.2026 Published: 24.07.2026 Updated: 24.07.2026

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.

Metrics

CVSS 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
CVSS Score: 8.4

Product Status

Vendor Loytec
Product LIP-ME20xC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-INX
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-GATE
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-ROC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-IOB
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-DALI
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-VIS
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-PAD
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)

Solutions

Upgrade to firmware version 8.4.18.

Credits

  • Daniel Hulliger, armasuisse CYD Campus finder
  • Damian Pfammatter, armasuisse CYD Campus finder

References

Problem Types

  • CWE-287 Improper authentication CWE
  • CWE-521 Weak password requirements CWE

Impacts

  • CAPEC-115 Authentication Bypass
  • CAPEC-122 Privilege Abuse