CVE-2026-2491 Socomec DIRIS A-40 HTTP API Authentication Bypass Vulnerability
Network-adjacent attackers can bypass authentication on Socomec DIRIS A-40 devices due to missing checks in the web API.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2491?
CVE-2026-2491 is a medium-severity authentication bypass vulnerability in Socomec DIRIS A-40, published on 13 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Socomec DIRIS A-40 HTTP API Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Socomec DIRIS A-40 power monitoring devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the web API implementation, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-23993.
Weakness: CWE-306
Which versions are affected by CVE-2026-2491?
How do I fix CVE-2026-2491?
No fix has been published for CVE-2026-2491 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-2026-2491 being exploited?
There is no known exploitation of CVE-2026-2491 in the wild and no public exploit code.
Sources
Also known as GHSA-7q24-fxcq-rmwc.