CVE-2026-12504 Loytec LINX firmware: Improper Authentication in PAM configuration
Local attackers can gain root access without a password due to improper PAM configuration in Loytec LINX devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12504?
CVE-2026-12504 is a high-severity authentication bypass vulnerability in Loytec L-DALI, published on 24 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper Authentication (CWE-287) in the PAM configuration in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field.
Which versions are affected by CVE-2026-12504?
How do I fix CVE-2026-12504?
No fix has been published for CVE-2026-12504 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-12504 being exploited?
There is no known exploitation of CVE-2026-12504 in the wild and no public exploit code.
Sources
Also known as GHSA-6gf2-c64f-3g3h.