CVE-2026-12503
Critical
Description
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`.
SeverityCritical
CVSS9.2
Exploit probability—
ProductL-INX
PublishedJul 24, 2026
First seenJul 24, 2026
Weakness typeCWE-59Improper link resolution
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Loytec L-INX | v ≤ 8.4.16 | — |
| Loytec LIP-ME20xC | v ≤ 8.4.16 | — |
| Loytec L-GATE | v ≤ 8.4.16 | — |
| Loytec L-ROC | v ≤ 8.4.16 | — |
| Loytec L-IOB | v ≤ 8.4.16 | — |
| Loytec L-DALI | v ≤ 8.4.16 | — |
| Loytec L-VIS | v ≤ 8.4.16 | — |
| Loytec L-PAD | v ≤ 8.4.16 | — |
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