CVE-2026-69772: Windows Network File System Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Network File System allows an unauthorized attacker to execute code over a network.
Other sources
Windows Network File System 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 6.2.9200.26349Patch KB5123065 - 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 10.0.28000.2954Patch KB5124012 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7725Patch KB5122878 - 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 10.0.26200.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882
Event History
Frequently Asked Questions
Which systems should be prioritized for remediation?
Prioritize Microsoft Windows 10 and Windows 11 endpoints and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems that are reachable over the network. The vulnerability can lead to code execution with high confidentiality, integrity, and availability impact.
Does exploitation require an authenticated account or elevated privileges?
No. The vector indicates network-based exploitation with low attack complexity and no privileges required, although user interaction is required.
How can we confirm whether a host is affected?
Compare the host operating system against the listed affected products and consult the referenced Microsoft advisory for CVE-2026-69772. The provided information does not identify affected build numbers or update levels.