CVE-2026-88127

7.0High

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

7.0High

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-416

Impact

Local attackers with standard user credentials can gain SYSTEM privileges on affected Windows hosts. They require local authentication and the ability to trigger a complex race condition against the SMB server.

Root cause

A use-after-free condition in the Windows SMB Server driver allows unauthorized memory access and local privilege escalation.

Affected systems

Versions not listed — check the vendor advisory.

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

Fix & remediation

Install the Microsoft security update for CVE-2026-88127. If patching immediately is not possible, stop and disable the Server service (LanmanServer) on non-file-sharing hosts.

shell

$ powershell -Command "Get-HotFix | Select-Object -ExpandProperty HotFixID"

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

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NVD description

Use after free in Windows SMB Server allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88127

Source: nvd.nist.gov/vuln/detail/CVE-2026-88127