CVE-2026-35416: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with low privileges and no user interaction, but the attacker must overcome high attack complexity. Successful exploitation can result in full confidentiality, integrity, and availability impact, effectively allowing privilege escalation. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges, potentially gaining higher system rights. The CVSS score of 7 reflects high impact on confidentiality, integrity, and availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Apply the official Microsoft security update available for Windows 10 Version 1607 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35416 for detailed patch information and deployment guidance.
CVE-2026-35416: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with low privileges and no user interaction, but the attacker must overcome high attack complexity. Successful exploitation can result in full confidentiality, integrity, and availability impact, effectively allowing privilege escalation. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges, potentially gaining higher system rights. The CVSS score of 7 reflects high impact on confidentiality, integrity, and availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Apply the official Microsoft security update available for Windows 10 Version 1607 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35416 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-02T19:21:11.804Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35416","vendor":"Microsoft"}]
Threat ID: 6a036547cbff5d861008c636
Added to database: 5/12/2026, 5:37:11 PM
Last enriched: 5/12/2026, 7:08:11 PM
Last updated: 5/13/2026, 4:51:51 AM
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.