Improper Link Resolution Affecting Loytec Products
CVE-2026-12503

9.2CRITICAL

Key Information:

Vendor

Loytec

Status
Lip-me20xc
L-inx
L-gate
L-roc
Vendor
CVE Published:
24 July 2026

What is CVE-2026-12503?

A vulnerability has been identified in various Loytec devices including the L-INX, L-GATE, and L-ROC, related to improper link resolution. An authenticated attacker using the 'larmapp' account can exploit this flaw through a symlink attack targeting the server's SSL certificate file. This exploitation can modify the permissions of critical system files, such as making /etc/passwd writable for the 'larmapp' group, potentially allowing for unauthorized escalation of privileges to root.

Affected Version(s)

L-DALI 0 <= 8.4.16

L-GATE 0 <= 8.4.16

L-INX 0 <= 8.4.16

References

https://www.loytec.com/support/product-security/advisorie...
vendor-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Daniel Hulliger, armasuisse CYD Campus
Damian Pfammatter, armasuisse CYD Campus
.