Executive brief
A security vulnerability exists in the Windows Network Policy Server, a component used to manage network access and authentication. An unauthorized attacker could exploit this flaw over the network to access sensitive information that should be protected. This could lead to the exposure of internal system data or configuration details, potentially aiding further attacks against the corporate network.
Technical details
An out-of-bounds read vulnerability (CWE-125) exists in the SNMP implementation of the Windows Network Policy Server (NPS). The flaw is triggered when the component improperly handles memory boundaries during the processing of specially crafted SNMP requests. An unauthenticated attacker can exploit this over the network without user interaction to read memory contents, leading to information disclosure. Microsoft has released security updates to address this issue across affected Windows and Windows Server versions.
Affected products
- Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
- Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
- Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
- Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26200.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2269
- Microsoft Windows Server 2012 6.2.9200.0 to 6.2.9200.26226
Timeline
- 2026-07-14: disclosed: Initial publication by Microsoft and NVD
- 2026-07-14: patched: Security updates released by Microsoft