Vulnerability Details CVE-2025-34027
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 Spack upload endpoint can be leveraged for a Time-of-Check to Time-of-Use (TOCTOU) write in combination with a race condition to achieve remote code execution via path loading manipulation, allowing an unauthenticated actor to achieve remote code execution (RCE).This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.452
EPSS Ranking 98.7%
CVSS Severity
CVSS v3 Score 9.0
References
Products affected by CVE-2025-34027
-
cpe:2.3:a:versa-networks:concerto:11.4.0
-
cpe:2.3:a:versa-networks:concerto:11.4.1
-
cpe:2.3:a:versa-networks:concerto:12.1.1
-
cpe:2.3:a:versa-networks:concerto:12.1.2
-
cpe:2.3:a:versa-networks:concerto:12.2.1