CASCACascade Atlas

Evidence dossier

CVE-2025-34026

Versa Concerto Actuator Authentication Bypass Information Leak

77.0–96.3Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
May 21, 2025
Updated
Jan 23, 2026
Evidence coverage
72%
CISA KEVCatalog member

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

FIRST EPSS83.48%

2026-07-18 · v2026.06.15 · percentile 99.7%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

VulnCheckoriginal assertion
container

Versa Concerto Actuator Authentication Bypass Information Leak

CISA KEVoriginal assertion
observed_exploitation

Versa Concerto Improper Authentication Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.834790000000; percentile 0.996530000000

Applicability

Cited product scope

Trace impact →
VersaConcerto
[{"status": "affected", "version": "12.1.2", "versionType": "semver", "lessThanOrEqual": "12.2.0"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*; start including 11.4.0; end excluding 12.1.2supported
Unknown vendorUnknown product
cpe:2.3:a:versa-networks:concerto:12.1.2:-:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:versa-networks:concerto:12.2.0:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

7.5
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
9.2
disclosure@vulncheck.comCVSS 4.0 · role SecondaryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
9.2
VulnCheckCVSS 4.0 · role unknownCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.