PT-2026-2720 · Microsoft · Local Security Authority Subsystem Service+1

Ziran Lin · Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20875

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Windows Local Security Authority Subsystem Service (LSASS) (affected versions not specified)

Description A flaw exists in the Windows Local Security Authority Subsystem Service (LSASS) that could allow an attacker to cause a denial of service over a network. The issue is a null pointer dereference. An unauthorized attacker can exploit this to disrupt the service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-00438

CVE-2026-20875

Affected Products

Windows

Local Security Authority Subsystem Service

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20875 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-20875 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00438 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-20875 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20875 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20875 · Vendor Advisory
• https://twitter.com/CVEnew/status/2011759662366859436 · Twitter Post