CVE-2025-34026

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.818 · 100 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

81.8% (100th) EPSS

CVSS 7.5 · high

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2026-01-22remediate by 2026-02-12

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.

EPSS · scored 2026-10-27

Versa Concerto Improper Authentication Vulnerability

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

Technical severity, 0–10. One row per scoring source.

9.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v4.09.2criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:Nsecondary · ENISA EU

v4.09.2criticalCVSS: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:Xsecondary · disclosure@vulncheck.com

v4.09.2criticalCVSS: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:A/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USCWE-288US

affected products (5)

Products and version ranges known to be affected.

Versa Concerto≤ 12.1.2 ≤12.2.0enisa_euvdEU
Versa Networks Concerto12.1.0 → 12.2.0fstec_bduRU
versa-networks concerto11.4.0 → 12.1.2nvdUScpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*
versa-networks concerto= 12.1.2nvdUScpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*
versa-networks concerto= 12.2.0nvdUScpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2025-05-21modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce cnnvd
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce enisa_euvd
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rceExploitMitigationThird Party Advisorynvd
https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2eVendor Advisorynvd
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026US Government Resourcenvd

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