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CVE-2026-2491: Socomec DIRIS A-40 HTTP API Authentication Bypass Vulnerability

• Severity: medium (CVSS 6.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-306

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.

Affected products

• Socomec DIRIS A-40: 1.8.1

References

• https://emea.socomec.com/en/resource-center/resource-type/cyber-vulnerabilities-601
• https://www.zerodayinitiative.com/advisories/ZDI-26-129/

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