CVE-2026-20875: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
AI Analysis
Technical Summary
This vulnerability is a null pointer dereference in the Windows LSASS component on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation can lead to denial of service conditions remotely without requiring user interaction or privileges. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service). Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can remotely cause a denial of service on affected Windows 10 Version 1607 systems by exploiting the null pointer dereference in LSASS. There is no impact on confidentiality or integrity, but availability is fully impacted. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20875 to remediate this vulnerability.
CVE-2026-20875: CWE-476: NULL Pointer Dereference in Microsoft Windows 10 Version 1607
Description
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a null pointer dereference in the Windows LSASS component on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation can lead to denial of service conditions remotely without requiring user interaction or privileges. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service). Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can remotely cause a denial of service on affected Windows 10 Version 1607 systems by exploiting the null pointer dereference in LSASS. There is no impact on confidentiality or integrity, but availability is fully impacted. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20875 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.387Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20875","vendor":"Microsoft"}]
Threat ID: 69668ae1a60475309f9ae172
Added to database: 01/13/2026, 18:11:45 UTC
Last enriched: 07/30/2026, 23:42:03 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 206
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