CVE-2026-20810: CWE-590: Free of Memory not on the Heap in Microsoft Windows 10 Version 1809
Free of memory not on the heap in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20810) arises from a CWE-590 condition where memory not allocated on the heap is freed improperly in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1809 (build 10.0.17763.0). The flaw enables a local attacker with some level of authorization to escalate privileges, potentially gaining higher system rights. The CVSS 3.1 vector indicates local attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. Microsoft has published this vulnerability and a patch is available to remediate it.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 Version 1809 system. Successful exploitation could lead to full system compromise, affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1809 (build 10.0.17763.0) to remediate this issue. No additional mitigation steps are specified or required beyond applying the patch.
CVE-2026-20810: CWE-590: Free of Memory not on the Heap in Microsoft Windows 10 Version 1809
Description
Free of memory not on the heap 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 (CVE-2026-20810) arises from a CWE-590 condition where memory not allocated on the heap is freed improperly in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1809 (build 10.0.17763.0). The flaw enables a local attacker with some level of authorization to escalate privileges, potentially gaining higher system rights. The CVSS 3.1 vector indicates local attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. Microsoft has published this vulnerability and a patch is available to remediate it.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 Version 1809 system. Successful exploitation could lead to full system compromise, affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1809 (build 10.0.17763.0) to remediate this issue. No additional mitigation steps are specified or required beyond applying the patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.372Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adaa60475309f9adf4a
Added to database: 1/13/2026, 6:11:38 PM
Last enriched: 4/3/2026, 12:41:00 PM
Last updated: 5/10/2026, 9:11:57 AM
Views: 79
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