CVE-2025-34026
Versa Concerto Improper Authentication Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 February 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 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.
- CVSS 4.0
- 9.2 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 81.94% probability · 100th percentile
- CISA KEV
- Listed 22 January 2026 · due 12 February 2026
- Weakness
- CWE-288
- Affected
- versa-networks/concerto
- Source
- disclosure@vulncheck.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e ; https://nvd.nist.gov/vuln/detail/CVE-2025-34026
References
- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rceExploit, Mitigation, Third Party Advisory
- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rceExploit, Mitigation, Third Party Advisory
- https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2eVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.