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 KEVIntel
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.
Severity
9.2 (Critical)
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
SSVC
Exploitation: active Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
Versa Concerto Affected: 12.1.2 , ≤ 12.2.0 (semver)
Create a notification for this product.
Credits
ProjectDiscovery Harsh Jaiswal Rahul Maini Parth Malhotra
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 9643bcaf-0fcc-4f7f-b35c-3e4af59d69f0

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
KEV entry ID: c078fe7d-18e2-48d5-a904-4fc402c1a1d5

Vulnerability ID: CVE-2025-34026

Status: Confirmed

Status Updated: 2026-07-08 00:00 UTC

Exploited: Yes

Characteristics
Severity: 0.0
Timestamps
First Seen: 2025-07-21
Asserted: 2025-07-21
Last Seen: 2026-07-08
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 2026-07-08: 1
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 2
90D Avg 1
Product Versa Concerto
Cisa Kev yes
Connections 1
Observation Date 2026-07-08
Vulnerability Class CVSS
Vulnerability Score 0
Vulnerability Severity None
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-10 01:01 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a3d3145d-364a-4108-9692-ed588727c6c3

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
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-34026\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-23T14:34:03.184960Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2026-01-22\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026\"}}}], \"references\": [{\"url\": \"https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce\", \"tags\": [\"exploit\"]}, {\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026\", \"tags\": [\"government-resource\"]}, {\"url\": \"https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e\", \"tags\": [\"vendor-advisory\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-05-22T15:22:12.724Z\"}}], \"cna\": {\"title\": \"Versa Concerto Actuator Authentication Bypass Information Leak\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"sponsor\", \"value\": \"ProjectDiscovery\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Harsh Jaiswal\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Rahul Maini\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Parth Malhotra\"}], \"impacts\": [{\"capecId\": \"CAPEC-131\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-131 Resource Leak Exposure\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 9.2, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"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\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Versa\", \"modules\": [\"Traefik\"], \"product\": \"Concerto\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.1.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"12.2.0\"}], \"defaultStatus\": \"unknown\"}], \"references\": [{\"url\": \"https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce\", \"tags\": [\"exploit\", \"mitigation\"]}], \"x_generator\": {\"engine\": \"vulncheck\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"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.\u003cp\u003eThis issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-288\", \"description\": \"CWE-288 Authentication Bypass Using an Alternate Path or Channel\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:versa:concerto:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"12.2.0\", \"versionStartIncluding\": \"12.1.2\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2025-11-28T19:42:27.561Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-34026\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-23T14:34:06.013Z\", \"dateReserved\": \"2025-04-15T19:15:22.545Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2025-05-21T22:04:58.832Z\", \"assignerShortName\": \"VulnCheck\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.