Is CVE-2025-30400 actively exploited?

Yes. KEV Intelligence tracks CVE-2025-30400 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2025-30400. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2025-30400 affects Microsoft Windows 10 Version 1809 and 13 other products. KEV Intelligence lists 13 version rows; examples include 10.0.17763.0 to < 10.0.17763.7314, 10.0.19044.0 to < 10.0.19044.5854, and 10.0.19045.0 to < 10.0.19045.5854.

Yes. CVE-2025-30400 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. KEV Intelligence attested it 377 days ahead of CISA.

CVE-2025-30400 Exploited in the Wild — Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)

Q: What is CVE-2025-30400?

CVE-2025-30400 is Microsoft DWM Core Library Elevation of Privilege Vulnerability. Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

Yes. CVE-2025-30400 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. KEV Intelligence attested it 377 days ahead of CISA.

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-30400 is Microsoft DWM Core Library Elevation of Privilege Vulnerability. Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Microsoft / Windows 10 Version 1809 affected before 10.0.17763.7314.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Use after free in Windows DWM allows an authorized attacker to elevate privileges locally

Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.

Vendor Product Affected Status

Microsoft Windows 10 Version 1809 Before 10.0.17763.7314 Affected

Microsoft Windows 10 Version 21H2 Before 10.0.19044.5854 Affected

Microsoft Windows 10 Version 22H2 Before 10.0.19045.5854 Affected

Microsoft Windows 11 version 22H2 Before 10.0.22621.5335 Affected

Microsoft Windows 11 version 22H3 Before 10.0.22631.5335 Affected

Microsoft Windows 11 Version 23H2 Before 10.0.22631.5335 Affected

Microsoft Windows 11 Version 24H2 Before 10.0.26100.4061 Affected

Microsoft Windows Server 2019 Before 10.0.17763.7314 Affected

Microsoft Windows Server 2019 (Server Core installation) Before 10.0.17763.7314 Affected

Microsoft Windows Server 2022 Before 10.0.20348.3692 Affected

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Before 10.0.25398.1611 Affected

Microsoft Windows Server 2025 Before 10.0.26100.4061 Affected

Microsoft Windows Server 2025 (Server Core installation) Before 10.0.26100.4061 Affected

View vendor advisory

Published: 13 May 2025
Exploitation Reported: 21 May 2025
Attack vector: Local
Complexity: Low
Privileges: Low
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-30400
Microsoft DWM Core Library Elevation of Privilege Vulnerability msrc.microsoft.com · Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30400

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 21 May 2025

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

Learn about Pro API access

Source	Added
CVE First	2025-05-21 13:10 UTC
CISA	2026-06-02 14:08 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.9%

Weaknesses

Use After Free CWE-416

Timeline

From disclosure to observed exploitation

02 Jun 2026
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
21 May 2025
Added to KEV Intelligence KEV Feed

High-confidence, third-party attested exploitation
13 May 2025
CVE published

Vulnerability disclosed publicly
21 Mar 2025
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-30400

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2025-30400",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.01855,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

CVE-2025-30400