Threats / Versa / CVE-2025-34026
CVE-2025-34026
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-19
Versa Concerto vulnerability
Versa Concerto contains an improper authentication vulnerability in Traefik reverse proxy configuration that allows attackers to access administrative endpoints and extract sensitive data via heap dumps and trace logs.
Verdict
Today item — known-exploited.
An unauthenticated attacker can bypass authentication controls to reach administrative endpoints in Versa Concerto SD-WAN orchestration platform, potentially exposing heap dumps and trace logs containing sensitive operational and credential information.
CISA KEV Yes · 2026-01-225EPSS 0.8194 (verify live)6CVSS 9.23CISA SSVC Exploitation: active · Automatable: yes · Impact: partial4Exploit Public PoC / detection · nuclei template13
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
188 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-22).
Probability (EPSS)
EPSS 0.8194 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.2 (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) · Affected: Versa, Concerto. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 4.0, set at disclosure.
Weakness (CWE)
Mapped to CWE-288 Auth Bypass via Alternate Path — weakness family: Authentication.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 246 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a public proof-of-concept / detection template). Catalog entries: nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I exploit the Traefik misconfiguration to bypass authentication and reach administrative endpoints without valid credentials.
Business
Attackers gain unauthorized access to critical SD-WAN orchestration infrastructure, enabling reconnaissance and lateral movement.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I access the internal Actuator endpoint to retrieve heap dumps and trace logs containing application state and sensitive data.
Business
Confidential operational details, configuration data, and potential credentials are exposed to unauthorized parties.
3
Lateral reach — past segmentation narrative 3
Attacker
I use extracted information to identify further vulnerabilities or misconfigurations in the SD-WAN environment.
Business
The organization's network infrastructure becomes vulnerable to follow-on attacks and complete compromise of SD-WAN controls.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by VulnCheckCNA
Credited with finding itProjectDiscoverysponsorHarsh JaiswalfinderRahul MainifinderParth Malhotrafinder
Found an error? Propose a correction.
A correction is a cited counter-claim — it must cite a source,
gets reviewed by a second human, and is never auto-applied. See the
correction convention and our identity
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