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

Vulnerability from cvelistv5 – Published: 2025-05-21 22:04 – Updated: 2026-01-23 14:34
VLAI CISA Shadowserver 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
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7165 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
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 00:00 UTC

Exploited: Yes


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

Scope
Notes: KEV entry: 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: 2026-02-02 12:25 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-34026

Status: Confirmed

Status Updated: 2026-07-19 00:00 UTC

Exploited: Yes


Characteristics
Severity: 0.0

Timestamps
First Seen: 2025-07-21
Asserted: 2025-07-21
Last Seen: 2026-07-19

Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Versa / Versa Concerto | Class: device-management-platform | Severity: None (CVSS 0) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-19: 3

Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver


Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class device-management-platform
7D Avg 0
Vendor Versa
30D Avg 0
90D Avg 2
Product Versa Concerto
Cisa Kev yes
Connections 3
Observation Date 2026-07-19
Vulnerability Class CVSS
Vulnerability Score 0
Vulnerability Severity None

References

Created: 2026-06-30 09:23 UTC | Updated: 2026-07-21 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-34026

Status: Confirmed

Status Updated: 2026-06-01 10:49 UTC

Exploited: Yes


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

Scope
Notes: KEVIntel entry: Versa Concerto Actuator Authentication Bypass Information Leak | Affected: Versa / Concerto | CVSS: 9.2 (CRITICAL) | EPSS: 0.83381 | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel


Details
Feed KEVIntel (kevintel.com)
Title Versa Concerto Actuator Authentication Bypass Information Leak
Vendor Versa
Product Concerto
Added Date 2026-06-01T10:49:32.706Z
Cvss Score 9.2
Epss Score 0.83381
Cvss Severity CRITICAL
Epss Percentile 0.99643
Used In Malware unknown
Ahead Of Cisa Kev
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False

References

Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website

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                    {
                      "criteria": "cpe:2.3:a:versa:concerto:*:*:*:*:*:*:*:*",
                      "versionEndIncluding": "12.2.0",
                      "versionStartIncluding": "12.1.2",
                      "vulnerable": true
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          "credits": [
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              "type": "sponsor",
              "value": "ProjectDiscovery"
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              "value": "Harsh Jaiswal"
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              "value": "Rahul Maini"
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              "lang": "en",
              "supportingMedia": [
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            }
          ],
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              "capecId": "CAPEC-131",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-131 Resource Leak Exposure"
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            }
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            {
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                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
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                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 9.2,
                "baseSeverity": "CRITICAL",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "LOW",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "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"
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              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
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              ]
            }
          ],
          "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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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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.