EUVD-2026-43984
GHSA-q78x-6ffp-9vhr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local privilege escalation from a low-privileged account (AV:L/PR:L), no interaction and low complexity, yielding full SYSTEM control so C:H/I:H/A:H within an unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper privilege management in Windows WalletService allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Windows WalletService allows an authenticated low-privileged attacker to gain SYSTEM-level rights on the host, per CVSS:3.1 AV:L/AC:L/PR:L (7.8, High). The flaw stems from improper privilege management (CWE-269) in the WalletService component and affects a broad range of Windows client and server builds. …
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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 foothold with at least low privileges on the target (PR:L, AV:L) and the ability to run code that interacts with the Windows WalletService component; no user interaction is needed (UI:N) and attack complexity is low (AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U, C:H/I:H/A:H = 7.8 High) describes a classic elevation-of-privilege primitive: local access and low existing privileges are required, no user interaction, low attack complexity, and full compromise of confidentiality, integrity and availability within the same scope. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already holds a standard (low-privileged) authenticated session on a Windows host - for example via commodity malware or a compromised user - runs a crafted local program that abuses WalletService's improper privilege management to obtain SYSTEM-level execution. Because the CVSS vector is AV:L/AC:L/PR:L/UI:N, no victim interaction is needed and the technique is low-complexity, though it presupposes the attacker's initial local foothold. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security updates referenced in the MSRC guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49176, selecting the cumulative update / KB that matches each affected build (Windows 10 1607-22H2, Windows 11 24H2-26H1, Windows Server 2016-2025 including Server Core). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems running WalletService and determine affected client and server builds against CVE-2026-49176. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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