CVE-2025-34027
9.0 · CRITICALOverview
CVE-2025-34027 is a critical-severity vulnerability affecting versa-networks concerto. It was published on May 21, 2025 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from versa-networks. Update concerto to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| versa-networks | concerto | 11.4.0 | Affected |
Frequently Asked Questions
What is CVE-2025-34027?
CVE-2025-34027 is a critical-severity vulnerability affecting versa-networks concerto. It was published on May 21, 2025 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
How severe is CVE-2025-34027?
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-34027?
Check the references section for vendor advisories and patches from versa-networks. Update concerto to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-34027?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-34027 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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