EUVD-2026-73523
GHSA-w6jx-m35w-2f28
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Pre-auth network-reachable service justifies AV:N/PR:N/UI:N and code-exec C/I/A:H, but reliable RCE from an OOB read against modern Windows heap mitigations warrants AC:H over AC:L.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in the Windows Event Logging Service (EventLog) affects a broad range of currently-supported Windows client and server editions, from Windows 10 1607/1809/21H2/22H2 and Windows 11 through 26H1, to Windows Server 2012 through Server 2025. An out-of-bounds read in the service's network-facing parsing path allows an unauthorized attacker to execute code over the network per Microsoft's advisory, which rates it CVSS 9.8. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector is AV:N/AC:L/PR:N/UI:N, indicating no authentication and no user interaction are required against a default configuration where the Windows Event Logging Service is reachable over the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) describes the worst-case profile: network reachable, low complexity, no privileges, no user interaction, with full confidentiality/integrity/availability impact - hence the 9.8. … 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 cumulative/security update that raises the EventLog service binaries to at least the fixed build for your edition (e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Windows systems in your environment running affected versions (Windows 10 1607/1809/21H2/22H2, Windows 11 up to 26H1, Windows Server 2012-2025) and consult Microsoft's advisory for the specific security updates applicable to each version. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today