What is the CVSS score of CVE-2025-49686?

CVE-2025-49686 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Windows are affected by CVE-2025-49686?

CVE-2025-49686 is a privilege escalation vulnerability in Windows TCP/IP that allows authenticated local users to gain elevated system privileges.. A patch is available.

How to fix or mitigate CVE-2025-49686?

Within 24 hours: Identify all Windows systems running affected TCP/IP stack versions and inventory them by business unit. Within 7 days: Apply the vendor-released patch across development and non-production environments, beginning with systems holding sensitive data or administrative access. Within 30 days: Complete patch deployment to all production Windows systems, prioritizing servers and workstations with restricted physical access.

Windows CVE-2025-49686

EUVD-2025-20638 HIGH

NULL Pointer Dereference (CWE-476)

2025-07-08 secure@microsoft.com

Windows Denial Of Service Null Pointer Dereference 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

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:30 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

10.0.14393.8246,10.0.22631.5624,6.0.6003.23418

EUVD ID Assigned

Mar 16, 2026 - 04:21 euvd

EUVD-2025-20638

Analysis Generated

Mar 16, 2026 - 04:21 vuln.today

CVE Published

Jul 08, 2025 - 17:15 nvd

HIGH 7.8

DescriptionCVE.org

Null pointer dereference in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

Analysis

Null pointer dereference in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

Technical ContextAI

A NULL pointer dereference occurs when the application attempts to use a pointer that has not been initialized or has been set to NULL.

RemediationAI

Add NULL checks before pointer dereference operations. Use static analysis to identify potential NULL pointer issues. Enable compiler warnings.

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CVE-2025-49686 vulnerability details – vuln.today

Back

Windows CVE-2025-49686

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Technical ContextAI

RemediationAI

More in Windows

Same weakness CWE-476 – NULL Pointer Dereference

Same technique Denial Of Service

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External POC / Exploit Code