CRITICAL 9.8 Microsoft

CVE-2026-69431

Telnet Client Remote Code Execution Vulnerability

Microsoft Security Update 2026-Sep: Telnet Client Remote Code Execution Vulnerability

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems

References

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-27

This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-09-08 via Microsoft. Affected: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 5 more.

Risk Timeline

CVE Disclosed2026-09-08 · 48 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69431

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2026-69431

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2026-57092	Microsoft Windows VMSwitch Elevation of Privilege Vulnerability	CRITICAL	9.9
CVE-2025-49708	Microsoft Graphics Component Elevation of Privilege Vulnerability	CRITICAL	9.9
CVE-2026-100202	Windows Message Queuing Queue Manager Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-100219	Microsoft QUIC Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-100222	Network Policy Server (NPS) Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-102210	Windows Text Shaping Remote Code Execution Vulnerability	CRITICAL	9.8

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