CVEs / CVE-2025-34026
CVE-2025-34026: Versa Concerto Improper Authentication Vulnerability
- Known exploited in the CISA KEV catalog since 22 Jan 2026
- high 7.5 CVSS 3.1 (NVD)
- EPSS 81.7% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Versa Concerto SD-WAN orchestration platform contains an improper authentication vulnerability 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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Versa Concerto | from 12.1.2, up to and including 12.2.0 | — |
Exploitation
| In CISA KEV since | 22 Jan 2026 |
|---|---|
| Due date for US federal agencies | 12 Feb 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NScored by NVD |
|---|---|
| Weakness | CWE-288 |
References
- CVE-2025-34026 on NVD
- CVE-2025-34026 in the CISA KEV catalog
- https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e (cited by CISA)
- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce Exploit, Mitigation, Third Party Advisory
- https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.