CVE-2025-34027
CriticalCVSS 9.0Exploitation Probability (EPSS)
Very high risk98th percentile - higher than 98% of all known CVEs
Summary
The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing an attacker to access administrative endpoints. The Spack upload endpoint can be leveraged for a TOCTOU write with a race condition to achieve remote code execution (RCE). This issue affects Concerto from 12.1.2 through 12.2.0.
Risk Assessment
An unauthenticated attacker can gain full control over the SD-WAN platform, potentially leading to network infrastructure compromise and data confidentiality/integrity breaches.
Recommendation
Update Concerto to a patched version if available. Restrict access to administrative endpoints and monitor network traffic for anomalies.
Other vulnerabilities in Versa Concerto
See all- CVE-2025-34026HighActively exploited
The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing an attacker to access administrative endpoints. The internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.
- CVE-2025-34025High
The Versa Concerto SD-WAN orchestration platform is vulnerable to a privileges escalation and container escape vulnerability caused by unsafe default mounting of host binary paths that allow the container to modify host paths. The escape can be used to trigger remote code execution or direct host access depending on the host operating system configuration. This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS