CVE-2025-34026Versa Concerto Actuator Authentication Bypass Information Leak

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.

9.2 CRITICALEPSS 81.78%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 09:13 UTC

OverviewCVSS details

9.2CRITICALCVSS 4.0

Score source: VulnCheck (CNA)
NVD status: Analyzed
Published: May 21, 2025
Assigner: VulnCheck

Affected

Concerto (Versa)

Versions: 12.1.2 through 12.2.0

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Jan 22, 2026
KEV due date: Feb 12, 2026
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact partial

EPSS · FIRST, scored Nov 7

81.78%chance of exploitation in 30 days

Higher than 99.64% of CVEs

CVSS 4.0 · VulnCheck (CNA)

9.2Critical

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

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: None
Availability impact: None
Confidentiality (other systems): High
Integrity (other systems): Low
Availability (other systems): None

CVSS 3.1 · NVD

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.2	CRITICAL	4.0VulnCheck (CNA)	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
7.5	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA required action

⚡ Known exploited · remediation due Feb 12, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2025-34026
Status: Analyzed
Assigner (CNA): VulnCheck
Published: May 21, 2025
Last modified: 2026-06-17 09:13 UTC
Weaknesses: CWE-288 · Authentication Bypass Using an Alternate Path or Channel

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 10:32 UTC.