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CVE-2025-34026

Versa Concerto Improper Authentication

7.5 HIGHActively exploited (CISA KEV)Public exploitEPSS 81.9%
  1. Published21 May 2025
  2. Added to CISA KEV22 Jan 2026
  3. Remediation due12 Feb 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 22 Jan 2026Federal remediation due: 12 Feb 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Versa-networks Concerto≥ 11.4.0 < 12.1.2 · 12.1.2 · 12.2.0

Remediation

Fixed in
Versa-networks Concerto≥ 12.1.2

References

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Frequently asked

Is CVE-2025-34026 being actively exploited?

Yes. CVE-2025-34026 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 22 Jan 2026.

How severe is CVE-2025-34026?

CVE-2025-34026 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 81.9% probability of exploitation.

Which products are affected by CVE-2025-34026?

Affected products include Versa-networks Concerto.

How do I fix CVE-2025-34026?

Upgrade affected software to a fixed version, for example Versa-networks Concerto 12.1.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-34026 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.