EUVD-2026-73580
GHSA-m23m-hcxh-f369
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with race-condition complexity (AC:H) and standard user privilege (PR:L) accurately capture UAF-in-kernel exploitation requirements; C/I/A all High reflect full SYSTEM compromise.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows ALPC allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Advanced Local Procedure Call (ALPC) subsystem, via a use-after-free memory corruption flaw (CWE-416), enables a locally authenticated standard user to gain full control of an affected Windows system. The vulnerability spans an exceptionally broad product surface - from Windows Server 2012 through Windows 11 26H2 and Server 2025 - making it relevant to nearly every Windows deployment environment. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have an active low-privilege local process on the target Windows machine (PR:L), achievable via any standard domain or local user account or a previously established foothold. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score reflects the combination of high local impact (C:H/I:H/A:H) tempered by AV:L and AC:H, which together substantially reduce exploitability compared to a network-reachable flaw. … 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 the Microsoft security updates corresponding to each affected Windows version to reach the minimum fixed builds listed above - for example, Windows Server 2025 should be updated to build 10.0.26100.33438 or later, and Windows 11 24H2/25H2 to 10.0.26100.9445 or 10.0.26200.9445 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows systems across your environment to identify affected versions (Server 2012 through Server 2025, Windows 11 through 26H2). …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today