CrowdSec
4/10CrowdSec Score

Concerto - Authentication Bypass (CVE-2025-34026)

Published on21-05-2025
First seen on28-05-2025
CVSS 9.2/10Versa - Concerto

178Exploiting IPs reported

The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.

CrowdSec analysis

CVE-2025-34026 is a critical vulnerability impacting the Versa Concerto SD-WAN orchestration platform, resulting from an authentication bypass in the reverse proxy configuration. This flaw enables attackers to access sensitive administrative endpoints, potentially exposing heap dumps and trace logs via the internal Actuator interface.

CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.

CrowdSec network observations suggest that most exploitation of CVE-2025-34026 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2025-34026 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Observed exploitation attempts often target URLs containing /portalapi/actuator.

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Blocklist

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