CVE Tools

CVE-2026-61348

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Published: Aug 11, 2026Updated: Aug 16, 2026 Sources: CVE List NVDCWE-416

Description

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

In plain language

AI Act now

This Windows local vulnerability can let a low-privileged attacker gain full control of the computer by triggering a memory mistake in the WinSock-related driver; if you’re running affected Windows and haven’t installed the listed updates, you should act.

Executive summary

CVE-2026-61348 is a local privilege escalation (CWE-416) in the Windows Ancillary Function Driver for WinSock, where a memory error (use after being deleted) allows a low-privileged, locally authenticated attacker to elevate to full administrative/kernel-level access.

If affected, business impact
Full admin and kernel accessComplete system compromise riskData theft and ransomware enablementWider network access via takeover

What to do now

  1. Check which of the affected Windows versions you run and confirm your patch level (Windows Update “View update history” or your IT inventory).
  2. Upgrade/patch each system to the fixed version for your specific Windows release:
  3. Re-check after updating to ensure the target fixed build is actually installed.
  4. If patching can’t be completed right away, restrict local logons and remove unnecessary low-privilege accounts so fewer users can attempt local exploitation.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

and 25 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

4

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-61348 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows