PT-2021-2361 · Microsoft · Windows

Abdelhamid Naceri + 1 · Published 2021-03-09 · Updated 2023-12-29 · CVE-2021-26866

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The issue is related to an elevation-of-privilege vulnerability in the Windows Update Service, which is caused by insecure privilege management. This vulnerability can be exploited to allow an attacker to elevate their privileges. There is no information provided about the estimated number of potentially affected devices worldwide 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

Improper Privilege Management

Link Following

Weakness Enumeration

CWE-269

CWE-59

Related Identifiers

BDU:2021-01599

CVE-2021-26866

ZDI-21-286

Affected Products

Windows

References · 9

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-26866 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26866 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26866 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01599 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-286 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26866 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26866 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26866 · Vendor Advisory
• https://t.me/cibsecurity/24763 · Telegram Post