PT-2021-3831 · Microsoft · Windows User Profile Service+1

Halov · Published 2021-05-05 · Updated 2023-12-28 · CVE-2021-26426

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows User Profile Service (ProfSvc) (affected versions not specified)

Description The issue is related to insufficient access restrictions in the implementation of the user account profile picture in the Windows User Profile Service. It allows an attacker to elevate their privileges. There is no information provided about the estimated number of potentially affected devices or real-world incidents where this issue was exploited.

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

LPE

Link Following

Weakness Enumeration

CWE-59

CWE-264

Related Identifiers

BDU:2021-04161

CVE-2021-26426

ZDI-21-965

Affected Products

Windows

Windows User Profile Service

References · 11

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-26426 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26426 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26426 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26426 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-26426 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04161 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-965 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26426 · Security Note
• https://t.me/cvenotify/19638 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021081034 · Note
• https://t.me/cvenotify/65516 · Telegram Post