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Windows CVE-2025-47981

| EUVD-2025-20611 CRITICAL
Heap-based Buffer Overflow (CWE-122)
2025-07-08 secure@microsoft.com
Windows Buffer Overflow Heap Overflow Microsoft Windows 10 1507 Windows 10 1607 Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 22h2 Windows 11 23h2 Windows 11 24h2 Windows Server 2008 Windows Server 2012 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025
9.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

7
Analysis Updated
Apr 16, 2026 - 05:51 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
10.0.20348.3932,10.0.19045.6093,10.0.19044.6093
EUVD ID Assigned
Mar 16, 2026 - 04:21 euvd
EUVD-2025-20611
Analysis Generated
Mar 16, 2026 - 04:21 vuln.today
PoC Detected
Sep 26, 2025 - 17:24 vuln.today
Public exploit code
CVE Published
Jul 08, 2025 - 17:15 nvd
CRITICAL 9.8

DescriptionNVD

Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.

Analysis

Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).

RemediationAI

Use memory-safe languages or bounds-checked functions. Enable ASLR, DEP/NX, and stack canaries. Apply vendor patches promptly.

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CVE-2025-47981 vulnerability details – vuln.today
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