Known exploited vulnerability
CVE-2025-34026
The short answer
CVE-2025-34026 affects Versa Concerto and is rated critical (CVSS 9.2). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-01-22: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-288.
Severity
9.2 critical
CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Yes, since Jan 22, 2026
Federal due date Feb 12, 2026
EPSS, next 30 days
82%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Concerto. NVD's record lists the exact affected versions.
References
- projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce ExploitMitigationThird Party Advisory
- projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce ExploitMitigationThird Party Advisory
- security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026 US Government Resource
Questions
Is CVE-2025-34026 being exploited?
Yes. CISA added CVE-2025-34026 to its Known Exploited Vulnerabilities catalog on 2026-01-22, with a federal remediation due date of 2026-02-12.
How do I fix CVE-2025-34026?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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