CVE-2026-20875

CWE-476 — NULL Pointer Dereference5 documents5 sources

Severity

7.5HIGH

EPSS

0.1%

top 76.38%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Microsoft Windows 10 Version 1607 Microsoft Windows 10 Version 1809 Microsoft Windows 10 Version 21h2 +29 more

Timeline

PublishedJan 13

Description

Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages31 packages

▶CVEListV5microsoft/windows_server_2008_service_pack_26.0.6003.0 — 6.0.6003.23717

▶CVEListV5microsoft/windows_server_2008_r2_service_pack_16.1.7601.0 — 6.1.7601.28117

▶CVEListV5microsoft/windows_server_2008_service_pack_2_(server_core_installation)6.0.6003.0 — 6.0.6003.23717

▶CVEListV5microsoft/windows_server_2008_r2_service_pack_1_(server_core_installation)6.1.7601.0 — 6.1.7601.28117

▶NVDmicrosoft/windows< 10.0.14393.8783+5

🔴Vulnerability Details

CVEList

Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability↗2026-01-13

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GHSA

GHSA-hjhf-9j6x-5777: Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network↗2026-01-13

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📋Vendor Advisories

Microsoft

Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability↗2026-01-13

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🕵️Threat Intelligence

Wiz

CVE-2026-20875 Impact, Exploitability, and Mitigation Steps | Wiz↗

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