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CVE-2025-32709

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Exploited in the wild. In CISA KEV since 2025‑05‑13. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile78th1.8% chance in 30 daysCISA KEVListedsince 2025-05-13, due 2025-06-03
No public exploit knownFix5 products10 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1507Affected: ≥ 10.0.10240.0, < 10.0.10240.21014Upgrade to: 10.0.10240.21014Affected: ≥ 10.0.14393.0, < 10.0.14393.8066Upgrade to: 10.0.14393.8066Affected: ≥ 10.0.17763.0, < 10.0.17763.7314Upgrade to: 10.0.17763.7314Affected: ≥ 10.0.19044.0, < 10.0.19044.5854Upgrade to: 10.0.19044.5854 + 1 more branchStated by: CVE record
  • Microsoft Windows 11 version 22H2Affected: ≥ 10.0.22621.0, < 10.0.22621.5335Upgrade to: 10.0.22621.5335Affected: ≥ 10.0.22631.0, < 10.0.22631.5335Upgrade to: 10.0.22631.5335Affected: ≥ 10.0.26100.0, < 10.0.26100.4061Upgrade to: 10.0.26100.4061Stated by: CVE record
  • Microsoft Windows Server 2008 R2 Service Pack 1Affected: ≥ 6.1.7601.0, < 6.1.7601.27730Upgrade to: 6.1.7601.27730Stated by: CVE record
  • Microsoft Windows Server 2008 Service Pack 2Affected: ≥ 6.0.6003.0, < 6.0.6003.23317Upgrade to: 6.0.6003.23317Stated by: CVE record
  • Microsoft Windows Server 2012Affected: ≥ 6.2.9200.0, < 6.2.9200.25475Upgrade to: 6.2.9200.25475Stated by: CVE record

Versions as the sources state them. 5 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened. 1 further article named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS78th
CISA KEV
CISA KEV

Listed as exploited in the wild since 2025-05-13.

US federal agencies must remediate by 2025-06-03.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.8% chance of exploitation activity in the next 30 days, which ranks it in the 78th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

7 events over 408 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Added to CISA KEVpublished, weakness classified, att&ck mapped

Affected products

And 53 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 1 more reference. See all after sign-in

Analysis on the cve.tools blog

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1507, not every advisory. This one: actively exploited.