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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 45.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 4.0
- 10.0 CRITICALCVSS: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/M
- EPSS
- 45.22% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-367
- Affected
- versa-networks/concerto
- Source
- disclosure@vulncheck.com
References
- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rceExploit, Third Party Advisory
- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rceExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.