EUVD-2026-44095
GHSA-qhxp-2823-2pw9
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network-reachable service (AV:N/AC:L) but requires valid low-privilege credentials (PR:L) and a triggering user action (UI:R); code execution yields high C/I/A with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Insufficient granularity of access control in Windows Event Logging Service allows an authorized attacker to execute code over a network.
AnalysisAI
Remote code execution in the Microsoft Windows Event Logging Service allows an authenticated attacker with low privileges to execute code over a network after enticing a user into an interaction (UI:R), due to insufficient granularity of access control (CWE-1220). The flaw affects a broad range of Windows client and server builds from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to (1) already hold low-privilege authenticated access (PR:L) - not anonymous/unauthenticated - and (2) obtain user interaction (UI:R), meaning a user must perform an action that triggers the vulnerable path; the vector is network-reachable (AV:N) against the Windows Event Logging Service with low complexity (AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 8.0 (High) with vector AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - network reachable, low attack complexity, but requiring low-privilege authentication (PR:L) AND user interaction (UI:R), which are the two factors holding the score below critical. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A low-privileged but authenticated attacker on the network crafts a malicious interaction targeting the Windows Event Logging Service and induces a user to trigger it (UI:R), exploiting the coarse access-control boundary to run code with the service's privileges. Because AC:L and AV:N apply, once the attacker has valid low-level credentials and can get the required interaction, the technical barrier is low. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50502 to all affected Windows client and server builds; a vendor patch is available per the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50502 (consult that page for the exact per-build KB numbers, which were not enumerated in the provided data). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows 10 and Windows Server deployments to map affected builds (Windows 10 version 1607 through 26H1, Windows Server 2012 through 2025). …
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