CVE-2026-71336: Windows Work Folder Service Remote Code Execution Vulnerability
Integer overflow or wraparound in Windows Work Folder Service allows an authorized attacker to execute code over a network.
Other sources
Windows Work Folder Service Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must be authorized, meaning they need valid privileges before exploiting the vulnerability. Exploitation can be performed over a network and does not require user interaction.
Which systems are identified as affected?
The affected software list includes Microsoft Windows 10 and Windows Server 2012 R2, 2016, 2019, 2022, and 2025. The provided data does not identify specific builds, editions, or update levels.
What security impact could successful exploitation have?
Successful exploitation allows code execution and is rated high severity with high confidentiality, integrity, and availability impact. The supplied vector indicates the impact remains within the vulnerable security authority.