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`.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Upgrade to firmware 8.4.18.


Workaround

No workaround given by the vendor.

History

Fri, 24 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
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`.
Title Loytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starter
Weaknesses CWE-59
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-07-24T14:57:47.202Z

Reserved: 2026-06-17T09:48:11.206Z

Link: CVE-2026-12503

cve-icon Vulnrichment

Updated: 2026-07-24T14:57:41.733Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses