PT-2026-2716 · Microsoft · Windows

Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20871

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Windows versions (affected versions not specified)

Description A use-after-free condition exists in the Desktop Windows Manager that could allow an authorized attacker to gain elevated privileges on a local system.

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

LPE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-00649

CVE-2026-20871

ZDI-26-044

Affected Products

Windows

References · 9

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20871 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-20871 · Security Note
• https://bdu.fstec.ru/vul/2026-00649 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20871 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20871 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-20871 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-26-044 · Security Note
• https://twitter.com/SystemTek_UK/status/2011762627626537089 · Twitter Post
• https://twitter.com/CVEnew/status/2011181512998469687 · Twitter Post