CVE-2025-34026 Versa Concerto: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Feb 12, 2026
What to do
- Install Versa's security update for Concerto. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Versa Concerto Improper Authentication Vulnerability
- Product
- Versa Concerto
- CISA description
- 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.
- Type of flaw
- Login or permission bypass (CWE-288)
- Confirmed exploited
- Jan 22, 2026
- US federal patch deadline
- Feb 12, 2026
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Answering about CVE-2025-34026 ·
Questions about CVE-2025-34026
Is CVE-2025-34026 being exploited?
Yes. CISA added CVE-2025-34026 to its Known Exploited Vulnerabilities catalog on Jan 22, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2025-34026?
Install Versa's security update for Concerto. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2025-34026?
Only if you use Versa Concerto. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.