CVE-2025-21382

Local privilege escalation via heap buffer overflow

Published Jan 14, 2025 · Updated Jun 9, 2026

Elevation of privilege in Microsoft Windows Graphics Component allows local users to gain elevated privileges through local access. The public record maps integer overflow and heap-based buffer overflow, but Microsoft has not disclosed the affected routine or erroneous input operation. Exploitation requires existing low-privileged local access and grants elevated privileges without user interaction.

CVSS severity7.8

High

EPSS probability0.50%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2025-21382
Published: Jan 14, 2025
Updated: Jun 9, 2026

Vendor: Microsoft
Product: Windows Server 2019
Classifications: CWE-122, CWE-190, T1068

Attack vector: local
Privileges: authenticated

Timeline

How it unfolded

Jan 14, 2025CVE publishedPublication date reported by the CVE source.
Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=10.0.17763.0 <10.0.17763.6775

What conditions does exploitation require?

Attack vectorlocal

Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.6775

Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.2894

Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.2894

Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.5371

Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1369

Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4751

Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.5371

Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.6775

Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4751

Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4751

Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.3091

Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.2894

Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.6775

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectorlocal

Privilegesauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

CWE-190Integer Overflow or Wraparound

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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