CVE-2025-34027 (GCVE-0-2025-34027)
Vulnerability from cvelistv5
Published
2025-05-21 21:58
Modified
2025-09-23 15:44
Severity ?
10.0 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Summary
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.
References
disclosure@vulncheck.comhttps://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
134c704f-9b21-4f2e-91b3-4a467353bcc0https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
Impacted products
Vendor Product Version
Versa Concerto Version: 12.1.2   ≤ 12.2.0
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