CVE-2026-73009

Published Sep 8, 2026

Last updated 23 days ago

CVSS critical 9.8
Tunneling protocol

Overview

Description
Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
windows_10_1607, windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_23h2, windows_11_24h2, windows_11_25h2, windows_11_26h1, windows_server_2012, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2025

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

secure@microsoft.com
CWE-416

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.