Description

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.

Classification

CVE ID: CVE-2025-34026

CVSS Base Severity: CRITICAL

CVSS Base Score: 9.2

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N

Affected Products

Vendor: Versa

Product: Concerto

Nuclei Template

http/cves/2025/CVE-2025-34026.yaml

Exploit Prediction Scoring System (EPSS)

EPSS Score: 4.04% (probability of being exploited)

EPSS Percentile: 87.93% (scored less or equal to compared to others)

EPSS Date: 2025-06-06 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-34026
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce

Timeline