VDB
CVE-2025-34027
CVE-2025-34027
PUBLISHED
CVSS 10 CRITICAL
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.
EPSS 2.78% · 86.4th percentile
Risk Scores
CVSS 4.0
10
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
EPSS Score
2.78%
86.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| versa | concerto | 12.1.2 |
| Versa | Concerto | 12.1.2 |
Timeline
- May 21, 2025 Coalition ESS Score
- May 21, 2025 CVE Published
- May 21, 2025 PoC Published
- May 22, 2025 EPSS Score
- May 22, 2025 Coalition ESS Score
- May 22, 2025 PoC Published
- May 22, 2025 PoC Published
- May 23, 2025 Coalition ESS Score
- May 23, 2025 PoC Published
- May 23, 2025 PoC Published
- May 23, 2025 PoC Published
- May 23, 2025 PoC Published