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CVE-2026-119889ImportantInformation DisclosureNetwork

ActiveSyncProvider Information Disclosure Vulnerability

MSRC advisory NVD CVE.org

Assessment

Out-of-bounds read in ActiveSyncProvider allows an unauthorized attacker to disclose information over a network.

Severity
Important
CVSS base score
6.5
Impact
Information Disclosure
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Unlikely
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Public detection template
No Nuclei template is listed in the current collected catalog
Component
ActiveSyncProvider
Weakness
CWE-125: Out-of-bounds Read
Issued by
Microsoft
Published
10 Nov 2026 · November 2026
Last revised
10 Nov 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
RequiredUI:R
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
NoneI:N
Availability
NoneA:N

Updates that fix it

7 KBs
KBTypeRestartApplies toOther CVEs
KB5131085 Security UpdateRequiredWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based SystemsAll CVEs in KB5131085
KB5131087 Security UpdateRequiredWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsAll CVEs in KB5131087
KB5131096 Security UpdateRequiredWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 moreAll CVEs in KB5131096
KB5131291 Security UpdateRequiredWindows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based SystemsAll CVEs in KB5131291
KB5132043 Security Update—Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 3 moreAll CVEs in KB5132043
KB5132059 Security UpdateRequiredWindows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based SystemsAll CVEs in KB5132059
KB5132061 Security UpdateRequiredWindows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 3 moreAll CVEs in KB5132061

Affected products

ESU, Windows
20 affected products
Page history

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

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