Concerto - Authentication Bypass (CVE-2025-34026)
160Exploiting 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.
According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-34026 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2025-34026 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2025-34026 is currently experiencing high visibility and active exploitation across the internet.
Observed exploitation attempts often target URLs containing /portalapi/actuator.
Exploitation
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Blocklist
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