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

CVE-2025-34026 has a CVSS 4.0 base score of 9.2 (Critical). CVSS 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. EPSS exploitation probability: 75.1%.

Is there a public PoC exploit available for CVE-2025-34026?

Yes, a public proof-of-concept exploit is available for CVE-2025-34026. Prioritise patching immediately. EPSS: 75.1%.

How to fix or mitigate CVE-2025-34026?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Concerto CVE-2025-34026

CRITICAL

Authentication Bypass Using an Alternate Path or Channel (CWE-288)

2025-05-21 disclosure@vulncheck.com

Authentication Bypass Concerto Versa Networks

9.2

CVSS 4.0 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-288 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Alternate path authentication
Impact	Critical risk (CVSS 9.2, EPSS 75.1%). Heap dumps contain cleartext credentials, API keys, and session tokens. The SD-WAN orchestration platform manages network infrastructure for potentially thousands of sites.
Exploit ScenarioDerived	An attacker accesses the unauthenticated Actuator heapdump endpoint, downloads a memory dump containing admin credentials, database passwords, and API keys. Using these credentials, they gain full control of the SD-WAN orchestration platform.

Emergency Immediate action required. Why: CRITICAL + in CISA KEV (actively exploited), no patch available.

Exploited in the wild (CISA KEV) No patch listed yet 75.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

Versa Concerto SD-WAN orchestration platform contains an authentication bypass in Traefik reverse proxy configuration, exposing Actuator endpoints with heap dumps and trace logs.

Earlier versions of this analysis (1)

v1 Mar 28, 2026 - 18:43 CVSS 9.2

An authentication bypass in Versa Concerto's Traefik reverse proxy configuration exposes Spring Boot Actuator endpoints containing heap dumps, trace logs, and sensitive application data.

RemediationAI

Apply Versa security updates. Restrict access to Actuator endpoints. Rotate all credentials that may have been exposed through heap dumps.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The CWE-288 authentication bypass in Traefik proxy misconfiguration allows unauthenticated access to Spring Boot Actuator endpoints including /actuator/heapdump (memory contents) and /actuator/trace (request logs with credentials).

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

None

Vulnerable system: Availability

None

Subsequent system: Confidentiality

High

Subsequent system: Integrity

Low

Subsequent system: Availability

None

Lifecycle Timeline

Added to CISA KEV

Jan 23, 2026 - 18:39 cisa

CISA KEV

PoC Detected

Jan 23, 2026 - 18:39 vuln.today

Public exploit code

CVE Published

May 21, 2025 - 22:15 nvd

CRITICAL 9.2

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Organizations using Versa Concerto SD-WAN orchestration platform face critical risk from CVE-2025-34026 rated CVSS 9.2. Successful exploitation could critically impact the confidentiality, integrity, and availability of affected systems. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. Immediate patching is required per CISA KEV mandate.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

Threat Score

7.1/10

Composite threat intelligence

EPSS Score

75.1%

Top 1% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS POC (1)

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV Yes

Public POC Yes

EPSS 75.1%

Patch available No

Active threat Yes

Deciding rule

CRITICAL + in CISA KEV (actively exploited), no patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.