PT-2025-50160 · Microsoft · Windows+3

Published 2025-12-09 · Updated 2026-02-21 · CVE-2025-62458

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 The issue involves multiple local privilege escalation flaws within Microsoft Windows. A heap-based buffer overflow exists in Windows Win32K - GRFX, potentially allowing an authorized attacker to gain elevated privileges. Additionally, type confusion and out-of-bounds access issues have been identified in win32kfull and win32kbase, also leading to local privilege escalation. These flaws allow attackers to affect the system and elevate their privileges.

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

LPE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2025-15523

CVE-2025-62458

ZDI-25-1046

ZDI-25-1047

ZDI-25-1048

ZDI-25-1049

Affected Products

Windows

Win32K

Win32Kbase

Win32Kfull

References · 16

• https://osv.dev/vulnerability/CVE-2025-62458 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-62458 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-15523 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-25-1047 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-62458 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-25-1049 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62458 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-25-1046 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-25-1048 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-62458 · Security Note
• https://twitter.com/TheZDIBugs/status/1998796615285424236 · Twitter Post
• https://twitter.com/TheZDIBugs/status/1998796614131990854 · Twitter Post
• https://twitter.com/CVEnew/status/1998781378360484017 · Twitter Post
• https://reddit.com/r/cybersecurity/comments/1pj0lvw/cve202562221_december_2025_patch_tuesday_57 · Reddit Post
• https://t.me/avleonovcom/1612 · Telegram Post