9

CVE-2025-34027

Medienbericht
Exploit

Versa Concerto Authentication Bypass File Write Remote Code Execution

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Versa-networks ≫ Concerto Version >= 11.4.0 <= 12.1.1
Versa-networks ≫ Concerto Version 12.1.2 Update -
Versa-networks ≫ Concerto Version 12.2.1 Update -
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 36.98% 0.984
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9 2.2 6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
disclosure@vulncheck.com 10 0 0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

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VulnDex Intel
Media Report
09.08.2025 11:36
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
Third Party Advisory
Exploit