EUVD-2026-73723
GHSA-xvhv-xwq7-mggv
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access required (AV:L), race condition demands precise timing (AC:H), low-privilege authenticated user needed (PR:L); full system compromise on success (C:H/I:H/A:H), no scope change (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Installer (msiexec) allows a low-privileged authenticated user to gain full SYSTEM-level control by exploiting a race condition on a shared resource during installer operations. The vulnerability is present across a broad swath of Windows desktop and server releases, from Windows Server 2012 through Windows Server 2025 and Windows 11 26H1. …
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 an authorized attacker with a valid local or domain user account (low-privilege shell or interactive logon) on the target Windows system - PR:L confirms authentication is required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.0 with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H correctly characterizes this as a meaningful but non-trivial local 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 the vendor-released security update available through Windows Update or WSUS - the fix is confirmed available from Microsoft (reported via secure@microsoft.com). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server 2012 R2, 2016, 2019, 2022, 2025 and Windows 11 26H1 systems, prioritizing production servers. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
View allShare
External POC / Exploit Code
Leaving vuln.today