Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2025-30400

Microsoft DWM Core Library Elevation of Privilege Vulnerability

Microsoft / Windows 10 Version 1809 · affected before 10.0.17763.7314

Watch CVE-2025-30400 Browse KEV feed
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
1.9%
First observed
—
Last observed
—

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. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

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.

Microsoft Affected
Windows 10 Version 1809
Before 10.0.17763.7314
Microsoft Affected
Windows 10 Version 21H2
Before 10.0.19044.5854
Microsoft Affected
Windows 10 Version 22H2
Before 10.0.19045.5854
Microsoft Affected
Windows 11 version 22H2
Before 10.0.22621.5335
Microsoft Affected
Windows 11 version 22H3
Before 10.0.22631.5335
Microsoft Affected
Windows 11 Version 23H2
Before 10.0.22631.5335
Microsoft Affected
Windows 11 Version 24H2
Before 10.0.26100.4061
Microsoft Affected
Windows Server 2019
Before 10.0.17763.7314
Microsoft Affected
Windows Server 2019 (Server Core installation)
Before 10.0.17763.7314
Microsoft Affected
Windows Server 2022
Before 10.0.20348.3692
Microsoft Affected
Windows Server 2022, 23H2 Edition (Server Core installation)
Before 10.0.25398.1611
Microsoft Affected
Windows Server 2025
Before 10.0.26100.4061
Microsoft Affected
Windows Server 2025 (Server Core installation)
Before 10.0.26100.4061
View vendor advisory (opens in new tab)
Published
13 May 2025
Exploitation Reported
21 May 2025
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None

Tags

microsoft cisa windows

CVE References

Exploitation evidence

Why Previdian 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

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian 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
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian 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

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

1.9%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use After Free CWE-416

Timeline

From disclosure to observed exploitation

  1. 14:08 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 13:10 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  3. 16:58 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 19:09 UTC

    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.

Start 14-day Pro trial Read API docs
  • 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

Sample API response 
{
  "cve_id": "CVE-2025-30400",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.01917,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}