# CVE-2025-34026: Versa Concerto - Authentication Bypass

> Live exploitation tracking for CVE-2025-34026 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-34026

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.2
- **Public exploit available:** Yes
- **Affected products:** Versa Concerto
- **Weaknesses:** CWE-287 (Improper Authentication)

## Description

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.

## CrowdSec analysis

[CVE-2025-34026](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-34026) is a critical vulnerability impacting the Versa Concerto SD-WAN orchestration platform, resulting from an authentication bypass in the reverse proxy configuration. This flaw enables attackers to access sensitive administrative endpoints, potentially exposing heap dumps and trace logs via the internal Actuator interface.

CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.

CrowdSec network observations suggest that most exploitation of CVE-2025-34026 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-34026 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-34026 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Observed exploitation attempts often target URLs containing `/portalapi/actuator`.

## Timeline

- 2025-05-21: CVE Published. CVE-2025-34026 is published to NVD.
- 2025-05-28: Rule Released. CrowdSec releases a rule to detect CVE-2025-34026 exploitation attempts against the CrowdSec Network.
- 2025-05-28: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-34026 for the first time.
- 2026-01-22: CISA KEV. CVE-2025-34026 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2026-02-12: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).

## References

- https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-34026.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-34026) follows observed exploitation activity for CVE-2025-34026. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.