EUVD-2026-73572
GHSA-m2wm-3qq4-h92w
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low-privileged account required; AC:H reflects race condition timing dependency; full C/I/A impact justified by SYSTEM-level privilege escalation outcome.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows Host Guardian Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Host Guardian Service (HGS) allows a low-privileged local attacker to gain SYSTEM-level access through a use-after-free memory corruption triggered by a race condition. Affected products span Windows 10 and 11 client editions alongside Windows Server 2019, 2022, and 2025, covering a broad enterprise and consumer Windows footprint across multiple build lines. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated attacker possessing at least a low-privileged local Windows account with the ability to execute arbitrary code on the target system (AV:L, PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.0 with AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H characterizes this as a locally-triggered, high-complexity privilege escalation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply Microsoft's released security update immediately via Windows Update, WSUS, or Microsoft Update Catalog, targeting each platform's respective patched build: Windows 10 1809 to 10.0.17763.9245 or later, Windows 10 21H2 to 10.0.19044.7725 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 24H2 and 25H2 to 10.0.26100.9445 or later, Windows 11 26H1 to 10.0.28000.2954 or later, Windows Server 2019 to 10.0.17763.9245 or later, Windows Server 2022 to 10.0.20348.5622 or later, and Windows Server 2025 to 10.0.26100.33438 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify affected Windows systems in your environment, particularly servers and systems with administrative roles or sensitive data access. …
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Same weakness CWE-362 – Race Condition
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today