EUVD-2026-44081
GHSA-c2g2-5fg2-7xvg
Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Local low-privilege attacker (AV:L/PR:L), race-condition timing makes it AC:H, no user interaction, and a low-priv process compromising the SYSTEM service yields scope change with full C/I/A impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Wireless Wide Area Network Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Wireless Wide Area Network (WWAN) Service allows a low-privileged authenticated user to win a race condition and gain SYSTEM-level privileges across Windows 10, Windows 11, and Windows Server 2019 through 2025. The flaw stems from improper synchronization of a shared resource (CWE-362), and the scope-changed CVSS impact (S:C) reflects that successful exploitation crosses from the attacker's low-privilege context into a higher-privileged service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already have a local, authenticated low-privilege account or code execution on the target (AV:L, PR:L), and the Windows Wireless WAN Service (wwansvc) must be present and reachable in the attacker's session - it is an in-box component on the listed Windows 10/11 and Server 2019-2025 builds. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.8 (High) with vector AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H, meaning local access, high attack complexity, low privileges required, no user interaction, a scope change, and full confidentiality/integrity/availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already holds a low-privileged foothold on a Windows host - for example a standard domain user on a shared terminal server or a malware process running as a normal user - runs a tool that repeatedly triggers WWAN service operations while racing a second thread to manipulate the shared resource at the exact moment of use. On a successful timing window they elevate from their low-privilege context to SYSTEM, achieving full control of the machine. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-50450 as delivered through the monthly cumulative update for each affected OS build; consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50450 for the exact KB and fixed build per version, as no single fixed version string is provided in the input. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows 10, Windows 11, and Windows Server 2019-2025 systems and identify which users have low-privileged local access (via remote desktop, VPN, or physical logon). …
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
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