PT-2021-5263 · Microsoft · Windows+1

Published 2021-07-13 · Updated 2025-11-28 · CVE-2021-33781

Positive Technologies (AI Summary)

CVSS v2.0

8.5

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:N

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

Description The issue is related to errors in security settings of the Azure Active Directory (Azure AD) service in Microsoft Windows operating systems. It allows a remote attacker to bypass the authentication process and elevate privileges in the system. The estimated number of potentially affected devices worldwide is not specified. There is no information about 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.

Weakness Enumeration

CWE-254

Related Identifiers

BDU:2021-06089

CVE-2021-33781

Affected Products

Azure Ad

Windows

References · 11

• https://osv.dev/vulnerability/CVE-2021-33781 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33781 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33781 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33781 · Security Note
• https://bdu.fstec.ru/vul/2021-06089 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33781 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-33781 · Vendor Advisory
• https://t.me/purp_sec/1305 · Telegram Post
• https://t.me/cvenotify/17613 · Telegram Post
• https://t.me/true_secator/1917 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021071386 · Note