How severe is CVE-2025-34026?

CVE-2025-34026 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-34026 being actively exploited?

Yes. CVE-2025-34026 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-01-22, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-34026?

CVE-2025-34026 primarily affects Versa-networks Concerto. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-34026?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-34026 have an EU (EUVD) identifier?

Yes. CVE-2025-34026 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16087. It is also flagged as exploited in the EUVD (since 2026-01-22).

When was CVE-2025-34026 published?

CVE-2025-34026 was published on 2025-05-21 and last updated on 2026-06-17.

CVE-2025-34026

CVE-2025-34026 is a high-severity vulnerability in Versa-networks Concerto with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-01-22). The underlying weakness is classified as CWE-288.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 83% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-01-22)
EU (EUVD) id: EUVD-2025-16087
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-01-22)
Weakness: CWE-288
Affected product: Versa-networks Concerto
Published: 2025-05-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-34026?: 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.
How severe is CVE-2025-34026?: CVE-2025-34026 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-34026 being actively exploited?: Yes. CVE-2025-34026 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-01-22, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-34026?: CVE-2025-34026 primarily affects Versa-networks Concerto. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-34026?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-34026 have an EU (EUVD) identifier?: Yes. CVE-2025-34026 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16087. It is also flagged as exploited in the EUVD (since 2026-01-22).
When was CVE-2025-34026 published?: CVE-2025-34026 was published on 2025-05-21 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*
cpe:2.3:a:versa-networks:concerto:12.1.2:-:*:*:*:*:*:*
cpe:2.3:a:versa-networks:concerto:12.2.0:*:*:*:*:*:*:*

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