VULNERABILITY INTELLIGENCE

CVE-2025-34027

CVSS score9 CRITICAL
EPSS probability46.40%
CISA KEVNot currently listed
Published2025-05-21
Last modified2026-08-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

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 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.

Weakness classification

  • disclosure@vulncheck.com: CWE-367

Primary references