PT-2021-2028 · Microsoft · Windows

Maxwell Whitaker · Published 2021-02-09 · Updated 2026-03-10 · CVE-2021-25195

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: Windows (affected versions not specified)

Description: The issue is related to the implementation of the PKU2U authentication protocol in Windows operating systems, specifically concerning access control weaknesses. Exploitation of this issue may allow an attacker to elevate their privileges.

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

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2021-00864

CVE-2021-25195

Affected Products

Windows

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-25195 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-25195 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00864 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25195 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-25195 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-25195 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-25195 · Vendor Advisory