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"original": {"product": "Windows Server 2022", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2022", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.25398.0,10.0.25398.2274)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2022, 23H2 Edition (Server Core installation)", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2022,_23h2_edition_(server_core_installation)", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.26100.0,10.0.26100.32690)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2025", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2025", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.26100.0,10.0.26100.32690)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2025 (Server Core installation)", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2025_(server_core_installation)", "vendor": "microsoft"}], "analysis": {"en": {"generated_at": "2026-04-14T19:01:27.049729+00:00", "value": {"mitigation_remediation": ["Apply the latest cumulative security updates from Microsoft for the affected operating system version via Windows Update or the Microsoft Update Catalog.", "Verify that the Desktop Window Manager service is running with the least privilege required and enforce strict user permissions on any applications that interact with DWM.", "If a patch is not yet available for a specific release, restrict the installation of third\u2011party software that could trigger the use\u2011after\u2011free by enabling application whitelisting or strong user permission policies."], "summary": {"action": "Immediate Patch", "impact": "Local Privilege Escalation via a Use After Free in Desktop Window Manager"}, "threat_synthesis": {"affected_systems": "The flaw affects multiple releases of Microsoft Windows, including Windows 10 version 21H2, Windows 10 version 22H2, Windows 11 versions 23H2, 24H2, 25H2, and 22H3, as well as Windows Server 2022, Windows Server 2025, and the Server 23H2 core edition. Users running any of these operating systems are potentially impacted.", "description_and_impact": "A use\u2011after\u2011free bug in the Desktop Window Manager causes an authorized local attacker to gain elevated privileges, allowing the attacker to execute code with higher privileges on the affected Windows system. The flaw is a CWE\u2011416 issue that can lead to arbitrary code execution and compromise of system integrity. The vulnerability enables the attacker to take complete control over the impacted machine, potentially allowing lateral movement, data exfiltration, or persistence.", "risk_and_exploitability": "With a CVSS score of 7.8 the vulnerability is considered high severity. No EPSS score is available, and the flaw is not in CISA\u2019s KEV catalog, suggesting that large\u2011scale exploitation is not currently documented. The attack vector is inferred to be local: an attacker must already be authenticated or have local execution privileges to trigger the use\u2011after\u2011free. Once executed, privilege escalation can be achieved without additional network exposure."}}}}, "created": "2026-04-15T14:45:03.391049+00:00", "updated": "2026-04-15T15:15:06.493444+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$windows_10_21h2", "microsoft$PRODUCT$windows_10_22h2", "microsoft$PRODUCT$windows_11_22h3", "microsoft$PRODUCT$windows_11_23h2", "microsoft$PRODUCT$windows_11_24h2", "microsoft$PRODUCT$windows_11_25h2", "microsoft$PRODUCT$windows_server_2022", "microsoft$PRODUCT$windows_server_2022,_23h2_edition_(server_core_installation)", "microsoft$PRODUCT$windows_server_2025", "microsoft$PRODUCT$windows_server_2025_(server_core_installation)"]}