CVE-2026-12503 — Loytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starter

Description (CNA)

Improper Link Resolution (CWE-59) in `/usr/bin/larm_starter` in Loytec L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an authenticated `larmapp` attacker to make `/etc/passwd` writable by the `larmapp` group (leading to root privilege escalation) via a symlink attack on `/etc/lighttpd/ssl/server.pem`.

Affected (CNA)

Vendor / product	Versions
Loytec / LIP-ME20xC	affected 0 through 8.4.16
Loytec / L-INX	affected 0 through 8.4.16
Loytec / L-GATE	affected 0 through 8.4.16
Loytec / L-ROC	affected 0 through 8.4.16
Loytec / L-IOB	affected 0 through 8.4.16
Loytec / L-DALI	affected 0 through 8.4.16
Loytec / L-VIS	affected 0 through 8.4.16
Loytec / L-PAD	affected 0 through 8.4.16

CWE

CWE-59

References

https://www.loytec.com/support/product-security/advisories/8520-dibt-cve-20260526-0002-symlink-following-in-chown-chmod-critical

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.