CVE-2025-21334
Review this vulnerability's source-backed evidence, with unavailable values and read failures kept distinct.
A permanent, source-backed tracker page. Values are shown only when returned; explicit gaps and read failures remain different states.
Detection and validation
Mapped metadata availability only. These signals do not change priority.
Sigma
Antivirus - Password Dumper Signature. Level: critical. Status: stable.
Open Sigma metadataAtomic
Access /etc/passwd (Local). Executor: sh. Elevation: not reported.
Open Atomic metadataNuclei
Not mapped by tracked sources.
What it is
ReportedMicrosoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.
Source reported · Source: NVD · Source last published: · Source description excerpt; complete tracked detail loads below. · Source last updated: · Tracker data as of:
What is affected
ReportedMicrosoft; Windows. Product-level identification only; no affected-version conclusion is available from this field.
Source reported · Source: NVD · Source last published: · Source last updated: · Tracker data as of:
Urgency and basis
ReportedAct now · 557.2
Tracker computed · Tracker decision tier from the evidence detailed below · Source last updated: · Tracker data as of:
Exploitation evidence
ReportedActive exploitation · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog
Source reported · Active since: · CISA KEV added: · VulnCheck KEV added: · ENISA added: · Source last updated: · Tracker data as of:
What to do
ReportedApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Source remediation ↗Source reported · Tracked source remediation field · Source last updated: · Tracker data as of:
Evidence detail
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