What is the CVSS score of CVE-2025-49687?

CVE-2025-49687 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-49687?

Within 24 hours: Identify all Windows systems with Microsoft IME enabled and prioritize critical infrastructure. Within 7 days: Apply the vendor-released patch to all affected systems, prioritizing servers and administrative workstations. Within 30 days: Verify patch deployment across the enterprise via endpoint management tools and conduct validation testing on non-production systems first.

Windows 10 1507 CVE-2025-49687

Q: Which versions of Windows 10 1507 are affected by CVE-2025-49687?

CVE-2025-49687 is a high-severity privilege escalation vulnerability in Microsoft Input Method Editor that permits authenticated local users to gain elevated system privileges.. A patch is available.

EUVD-2025-20637 HIGH

Out-of-bounds Read (CWE-125)

2025-07-08 secure@microsoft.com

Buffer Overflow Information Disclosure 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 2012 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-125 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, read limits MITRE ATT&CK 1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Out-of-bounds reads can leak sensitive information from memory, while out-of-bounds writes can corrupt data or enable code execution. With a CVSS score of 8.8 (HIGH), this represents a significant risk.
Exploit ScenarioDerived	An attacker provides a crafted input that causes the application to read or write beyond buffer boundaries, potentially leaking memory contents or hijacking control flow.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

Out-of-bounds read in Microsoft Input Method Editor (IME) allows an authorized attacker to elevate privileges locally.

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 04:21 CVSS 8.8

RemediationAI

Implement proper bounds checking on all array and buffer accesses. Use memory-safe languages or static analysis tools to detect OOB issues.

Affected VersionsENISA

Windows Server 2019 10.0.17763.0 <10.0.17763.7558

Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.6093

Windows Server 2012 R2 6.3.9600.0 <6.3.9600.22676

Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.7558

Windows 11 version 22H2 10.0.22621.0 <10.0.22621.5624

Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 <10.0.25398.1732

Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.5624

Windows 10 Version 1809 10.0.17763.0 <10.0.17763.7558

Windows 10 Version 1507 10.0.10240.0 <10.0.10240.21073

Windows Server 2025 10.0.26100.0 <10.0.26100.4652

Windows Server 2016 10.0.14393.0 <10.0.14393.8246

Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.6093

Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 <6.3.9600.22676

Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.4652

Windows 11 version 22H3 10.0.22631.0 <10.0.22631.5624

Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.4652

Windows 10 Version 1607 10.0.14393.0 <10.0.14393.8246

Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.8246

Windows Server 2022 10.0.20348.0 <10.0.20348.3932

Windows Server 2012 6.2.9200.0 <6.2.9200.25573

Windows Server 2012 (Server Core installation) 6.2.9200.0 <6.2.9200.25573

Affected Packages

euvd windows_10_version_1507 fix: 10.0.10240.21073

euvd windows_10_version_1607 fix: 10.0.14393.8246

euvd windows_10_version_1809 fix: 10.0.17763.7558

euvd windows_10_version_21h2 fix: 10.0.19044.6093

euvd windows_10_version_22h2 fix: 10.0.19045.6093

euvd windows_11_version_22h2 fix: 10.0.22621.5624

euvd windows_11_version_22h3 fix: 10.0.22631.5624

euvd windows_11_version_23h2 fix: 10.0.22631.5624

euvd windows_11_version_24h2 fix: 10.0.26100.4652

euvd windows_server_2012 fix: 6.2.9200.25573

euvd windows_server_2012_r2 fix: 6.3.9600.22676

euvd windows_server_2012_r2_server_core_installation fix: 6.3.9600.22676

euvd windows_server_2012_server_core_installation fix: 6.2.9200.25573

euvd windows_server_2016 fix: 10.0.14393.8246

euvd windows_server_2016_server_core_installation fix: 10.0.14393.8246

euvd windows_server_2019 fix: 10.0.17763.7558

euvd windows_server_2019_server_core_installation fix: 10.0.17763.7558

euvd windows_server_2022 fix: 10.0.20348.3932

euvd windows_server_2022_23h2_edition_server_core_installation fix: 10.0.25398.1732

euvd windows_server_2025 fix: 10.0.26100.4652

euvd windows_server_2025_server_core_installation fix: 10.0.26100.4652

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 21 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

An out-of-bounds memory access occurs when code reads from or writes to memory locations outside the intended buffer boundaries. This vulnerability is classified as Out-of-bounds Read (CWE-125).

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:C/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

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:30 EUVD-patch-fix

executive summary

Patch available

Apr 16, 2026 - 05:29 EUVD

10.0.17763.7558,10.0.19044.6093,6.3.9600.22676

CVE Published

Jul 08, 2025 - 17:15 nvd

HIGH 8.8

Executive ViewAI

Why It Matters

CVE-2025-49687 is a high-severity privilege escalation vulnerability in Microsoft Input Method Editor that permits authenticated local users to gain elevated system privileges. This affects Windows systems where IME is deployed and could enable attackers with valid credentials to compromise system integrity and access sensitive data.

Business Impact: High

Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score

0.1%

Top 78% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.