CVE-2026-83856

7.5High

Published 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

7.5High

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Impact: Full C/I/A compromise
Weakness: CWE-125

Impact

Remote attackers can execute arbitrary code over the network. Exploitation requires network reachability, high execution complexity, and user interaction.

Root cause

An out-of-bounds read flaw exists in the Windows Event Logging Service.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Fix & remediation

Install the security update from Microsoft via the MSRC advisory; no specific interim mitigation is documented in the advisory.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83856

Source: nvd.nist.gov/vuln/detail/CVE-2026-83856