Vulnerability in Versa Concerto
CVE-2025-34026
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 internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.
EPSS: 0.819 (99.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Versa Concerto — versions 12.1.2
- Versa-networks Concerto — versions 12.1.2, 12.2.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit, Mitigation, mitigation)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2025-34026?
- CVE-2025-34026 is a high-severity vulnerability in Versa Concerto, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2025-05-21.
- How severe is CVE-2025-34026?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-34026 known to be exploited?
- Yes. CVE-2025-34026 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-22), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.