CVE-2025-34026 (GCVE-0-2025-34026)

Vulnerability from cvelistv5 – Published: 2025-05-21 22:04 – Updated: 2026-01-23 14:34
VLAI CISA Previdian
Title
Versa Concerto Actuator Authentication Bypass Information Leak
Summary
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.
SSVC
Exploitation: active Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-23 14:34 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Impacted products
Vendor Product Version
Versa Concerto Affected: 12.1.2 , ≤ 12.2.0 (semver)
    cpe:2.3:a:versa:concerto:*:*:*:*:*:*:*:*
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-34026

Status: Confirmed

Status Updated: 2026-01-22 01:00 CET

Exploited: Yes


Timestamps
First Seen: 2026-01-22
Asserted: 2026-01-22

Scope
Notes: Versa Concerto Improper Authentication Vulnerability | Affected: Versa / Concerto | 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. | 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 date: 2026-02-12 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e ; https://nvd.nist.gov/vuln/detail/CVE-2025-34026

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-288
Feed CISA Known Exploited Vulnerabilities Catalog
Product Concerto
Due Date 2026-02-12
Date Added 2026-01-22
Vendorproject Versa
Vulnerabilityname Versa Concerto Improper Authentication Vulnerability
Knownransomwarecampaignuse Unknown

References

Created: 2026-10-02 08:09 CEST | Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-34026

Status: Confirmed

Status Updated: 2026-06-01 12:49 CEST

Exploited: Yes


Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01

Scope
Notes: Versa Concerto Actuator Authentication Bypass Information Leak | Affected: Versa / Concerto | CVSS: 9.2 (CRITICAL) | EPSS: 0.8194 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian


Details
Feed Previdian (previdian.com)
Title Versa Concerto Actuator Authentication Bypass Information Leak
Cve Id CVE-2025-34026
Vendor Versa
Ghsa Id None
Product Concerto
Added Date 2026-06-01T10:49:32.706Z
Cvss Score 9.2
Epss Score 0.8194
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.99642
Used In Malware unknown
Vulnerability Id CVE-2025-34026
Ahead Of Cisa Kev
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False

References

Created: 2026-10-02 09:09 CEST | Updated: 2026-10-02 09:09 CEST
Show details on NVD website

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                "vectorString": "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-288",
                  "description": "CWE-288 Authentication Bypass Using an Alternate Path or Channel",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-11-28T19:42:27.561Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "tags": [
                "exploit",
                "mitigation"
              ],
              "url": "https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Versa Concerto Actuator Authentication Bypass Information Leak",
          "x_generator": {
            "engine": "vulncheck"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2025-34026",
        "datePublished": "2025-05-21T22:04:58.832Z",
        "dateReserved": "2025-04-15T19:15:22.545Z",
        "dateUpdated": "2026-01-23T14:34:06.013Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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