Skip to main content
ExploitedIn CISA KEVFix available

CVE-2025-34026

Versa Concerto Actuator Authentication Bypass Information Leak

Exploitation confirmed. First attested on 2025-07-21 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2025-05-21
  • Fixed in12.1.2
  • WeaknessCWE-288

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2025-05-2122:15CVE publishedNVD
  2. 2025-07-2120:43Listed as exploited by GCVEGCVE
  3. 2025-07-2120:43Exploitation first reportedGCVE
  4. 2026-01-22Added to the CISA KEV catalogCISA KEV
  5. 2026-01-2314:34SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Versa-networks concerto
BranchAffectedFixed in
12.1≥ 11.4.0, < 12.1.212.1.2
12.1= 12.1.2no fix published
12.2= 12.2.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Versa Concertoother versions: unknown
    Affected
    • ≥ 12.1.2, ≤ 12.2.0no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-11-28

Fix

  1. Update Versa-networks concerto to 12.1.2
  2. 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.due 2026-02-12

Advisories and patches

Detection

read 2026-11-08 06:29 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-01-22
Patch Due Date
2026-02-12
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 4.0 vector
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
Published
2025-05-21
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-h2mm-jj4p-hm2p

Frequently asked questions

What is CVE-2025-34026?

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.

Is CVE-2025-34026 actively exploited?

Yes. CVE-2025-34026 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-02-12.

What is the CVSS score for CVE-2025-34026?

CVE-2025-34026 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, January 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record