CRITICAL 9.8 Microsoft PoC

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: 2026-09-19

This critical severity vulnerability with a CVSS score of 9.8 was published on 2025-07-08 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 32.6% (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 · 437 days ago

Public PoC Exploit AvailableWeaponised proof-of-concept code is publicly accessible

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

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CVE-2026-68839	Windows USB Mass Storage Class Driver Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-69276	Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-69408	Microsoft Windows Media Foundation Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-69431	Telnet Client Remote Code Execution Vulnerability	CRITICAL	9.8
CVE-2026-69463	Windows NTFS Remote Code Execution Vulnerability	CRITICAL	9.8

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