CVE-2023-21823
Published 2023-02-14 · Updated 2026-08-19 · Source secure@microsoft.com
Summary
CVE-2023-21823 is a high-severity (CVSS 7.8) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on February 14, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 7, 2023. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →Description
Windows Graphics Component Remote Code Execution Vulnerability
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Windows
Name: Microsoft Windows Graphic Component Privilege Escalation Vulnerability
Date added: 2023-02-14 · Due: 2023-03-07
Required action: Apply updates per vendor instructions.