⚠ Actively exploited
Added to CISA KEV on 2025-05-13. Federal agencies required to patch by 2025-06-03. Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable..

CVE-2025-32709 — Use After Free in Microsoft Windows 10 Version 1507

CWE-416 — Use After Free16 documents13 sources
Severity
7.8HIGHNVD
EPSS
0.6%
top 30.94%
CISA KEV
KEV
Added 2025-05-13
Due 2025-06-03
Exploit
No known exploits
Affected products
27
Microsoft Windows 10 Version 1507Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809+24 more
Timeline
PublishedMay 13
KEV addedMay 13
KEV dueJun 3
Latest updateApr 16
CISA Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description

Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages26 packages

▶NVDmicrosoft/windows< 10.0.14393.8066+5
▶NVDmicrosoft/windows_10_1507< 10.0.10240.21014
▶NVDmicrosoft/windows_10_1607< 10.0.14393.8066
▶NVDmicrosoft/windows_10_1809< 10.0.17763.7314
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.5854

🔴Vulnerability Details

4
VulDB
Microsoft Windows up to Server 2025 Ancillary Function Driver for WinSock use after free (EUVD-2025-14439 / Nessus ID 306737)↗2026-04-16
▶
CVEList
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability↗2025-05-13
▶
GHSA
GHSA-jwq6-vvcv-h2px: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally↗2025-05-13
▶
VulnCheck
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability↗2025
▶

📋Vendor Advisories

2
CISA
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability↗2025-05-13
▶
Microsoft
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability↗2025-05-13
▶

🕵️Threat Intelligence

9
Krebs
Patch Tuesday, May 2025 Edition↗2025-05-14
▶
Krebs
Patch Tuesday, May 2025 Edition↗2025-05-14
▶
Tenable
Microsoft’s May 2025 Patch Tuesday Addresses 71 CVEs (CVE-2025-32701, CVE-2025-32706, CVE-2025-30400)↗2025-05-13
▶
Qualys
Microsoft and Adobe Patch Tuesday, May 2025 Security Update Review↗2025-05-13
▶
Qualys
Microsoft and Adobe Patch Tuesday, May 2025 Security Update Review | Qualys↗2025-05-13
▶
CVE-2025-32709 — Use After Free in Microsoft | cvebase