CVE-2025-21224Network attack vector

Remote code execution via LPD use-after-free

Published Jan 14, 2025 · Updated Jun 9, 2026

Use-after-free in the Microsoft Windows LPD Service allows remote attackers to execute code through crafted network requests. Microsoft identifies improperly locked sensitive memory and a use-after-free but does not disclose the affected routine, object, or lifecycle error. The LPD service must be installed and reachable on TCP port 515; no authentication or user interaction is required, and successful exploitation compromises the host.

CVSS severity8.1
High
EPSS probability1.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Microsoft Windows LPD Service allows remote attackers to execute code through crafted network requests. Microsoft identifies improperly locked sensitive memory and a use-after-free but does not disclose the affected routine, object, or lifecycle error. The LPD service must be installed and reachable on TCP port 515; no authentication or user interaction is required, and successful exploitation compromises the host.

The record

CVE
CVE-2025-21224
Published
Jan 14, 2025
Updated
Jun 9, 2026
Vendor
Microsoft
Product
Windows Server 2025 (Server Core installation)
Classifications
CWE-416, CWE-591, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2025CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=10.0.26100.0 <10.0.26100.2894

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

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 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

Published CVSS scores

8.1MicrosoftCVSS:3.1/AV:N/AC:H/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-591Sensitive Data Storage in Improperly Locked Memory
T1190Exploit Public-Facing Application

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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