CVE-2025-34026

Name: CVE-2025-34026
Creator: NVD / NIST
Published: 2025-05-21T22:15:50.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.2/10Actively ExploitedEPSS 83.38%

Last modified Jun 17, 2026

CVE-2025-34026 is a critical-severity vulnerability rated 9.2/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 83.38% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS 4.0

9.2/10

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

EPSS Probability

83.38%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Feb 12, 2026.

Weakness Enumeration

CWE-288

Affected Software

Vendor	Product	Versions
Versa-Networks	Concerto	>= 11.4.0, < 12.1.2
Versa-Networks	Concerto	12.1.2
Versa-Networks	Concerto	12.2.0

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

Timeline

Published: May 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-34026?

How severe is CVE-2025-34026?

CVE-2025-34026 has a CVSS score of 9.2/10 (CRITICAL severity). The EPSS model estimates a 83.38% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-34026?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-34026?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST