CVE-2026-83769: OpenSSH for Windows use-after-free privilege escalation

CVE-2026-83769 · Severity: high · CVSS 7.8 · Published 2026-10-13

OpenSSH for Windows is a command-line tool that allows secure remote access to systems. A use-after-free vulnerability allows an authorized local user to escalate their privileges to a higher level on the system, potentially gaining full system control.

Technologies: Microsoft OpenSSH for Windows. Vendors: Microsoft.

Quick answers

Is CVE-2026-83769 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-83769 being exploited in the wild.
How severe is CVE-2026-83769?
High severity, with a CVSS score of 7.8, published 13 October 2026.
Which products and versions are affected?
Microsoft OpenSSH for Windows.
Is there a fix for CVE-2026-83769?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-83769 attacked?
It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-83769?
Check whether you run Microsoft OpenSSH for Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free vulnerability in OpenSSH for Windows allows an authenticated local attacker to execute arbitrary code with elevated privileges. The vulnerability requires prior local access to the system and can be exploited to escalate from a standard user account to administrator or system level.

Affected products

  • Microsoft OpenSSH for Windows

Timeline

  • 2026-10-13: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.