CVE-2026-85867

7.8High

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

7.8High

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-122

Impact

A local attacker with an existing low-privileged account can gain full system privileges and compromise the host. Exploitation requires local access without user interaction.

Root cause

A heap-based buffer overflow flaw exists in the Windows Remote Access Connection Manager service.

Affected systems

Versions not listed — check the vendor advisory.

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

Fix & remediation

Install the official Windows security update referenced in Microsoft advisory CVE-2026-85867. As an interim workaround if patching is delayed, stop and disable the Remote Access Connection Manager service (RasMan).

shell

$ Stop-Service -Name RasMan -PassThru | Set-Service -StartupType Disabled

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

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NVD description

Heap-based buffer overflow in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85867

Source: nvd.nist.gov/vuln/detail/CVE-2026-85867