CVE-2026-12503
CRITICALLoytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starter
Title source: cnaDescription
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`.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://www.loytec.com/support/product-security/advisories/8520-dibt-cve-20260526-0002-symlink-following-in-chown-chmod-critical
Scores
CVSS v4
9.2
EPSS
0.0014
EPSS Percentile
3.5%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-59
Status
published
Products (8)
Loytec/L-DALI
< 8.4.16
Loytec/L-GATE
< 8.4.16
Loytec/L-INX
< 8.4.16
Loytec/L-IOB
< 8.4.16
Loytec/L-PAD
< 8.4.16
Loytec/L-ROC
< 8.4.16
Loytec/L-VIS
< 8.4.16
Loytec/LIP-ME20xC
< 8.4.16
Published
Jul 24, 2026
Tracked Since
Jul 24, 2026