CVE-2021-33771

HIGHCVSS 7.8Known Exploited

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CISA Known Exploited Vulnerability

https://nvd.nist.gov/vuln/detail/CVE-2021-33771

Remediation deadline: November 17, 2021

Description

Microsoft Windows kernel contains an unspecified vulnerability that allows for privilege escalation.

Timeline

Published:July 14th, 2021 6:15 PM

Last modified:August 10th, 2026 7:58 PM

Added to KEV:November 3rd, 2021

CVSS Scoring

CVSS v3: 7.8 (HIGH)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2: 7.2

Affected Software

From NVD CPE configuration data

Vendors

microsoft

Products

windows_10_1507windows_10_1607windows_10_1809windows_10_1909windows_10_2004windows_10_20h2windows_10_21h1windows_8.1windows_rt_8.1windows_server_2004windows_server_2012windows_server_2016windows_server_2019windows_server_20h2

References & Reports

Advisories, patches, and third-party reports

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33771Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33771Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33771US Government Resource

Source: NIST NVD · Data may lag official sources by up to one minute