CRITICAL 9.8 Microsoft

CVE-2025-47981

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

Microsoft Security Update 2025-Jul: SPNEGO Extended Negotiation (NEGOEX) Security Mechanism 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: 2025-07-08 · Source: Microsoft · Feed updated: 2026-08-04

This critical severity vulnerability with a CVSS score of 9.8 was published on 2025-07-08 via Microsoft. EPSS score: 25.5% (top 2% of all CVEs by exploitation probability). 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 Disclosed2025-07-08 · 391 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47981

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2025-47981

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2026-57092	Microsoft Windows VMSwitch Elevation of Privilege Vulnerability	CRITICAL	9.9
CVE-2026-42990	SQL Server ODBC driver Elevation of Privilege Vulnerability	CRITICAL	9.8
CVE-2026-49172	Windows FTP Service Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-54990	Remote Desktop Client Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-50447	Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-50518	Windows DHCP Server Remote Code Execution Vulnerability	CRITICAL	9.8

vulnfeed aggregates 9166 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.