Microsoft: >> Windows 11 26h1 Security Vulnerabilities
An elevation of privilege vulnerability exists in the Network Driver Interface Specification (NDIS) when ndis.sys fails to check the length of a buffer prior to copying memory to it.
To exploit the vulnerability, in a local attack scenario, an attacker could run a specially crafted application to elevate the attacker's privilege level. An attacker who successfully exploited this vulnerability could run processes in an elevated context. However, an attacker must first gain access to the local system with the ability to execute a malicious application in order to exploit this vulnerability.
The security update addresses the vulnerability by changing how ndis.sys validates buffer length.
CVSS Score
8.8
EPSS Score
0.009
Published
2026-10-13
Out-of-bounds read in Windows IKE Extension allows an unauthorized attacker to disclose information over a network.
CVSS Score
7.5
EPSS Score
0.011
Published
2026-10-13
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVSS Score
8.8
EPSS Score
0.009
Published
2026-10-13
Insecure default variable initialization in Microsoft QUIC allows an unauthorized attacker to bypass a security feature over a network.
CVSS Score
7.5
EPSS Score
0.006
Published
2026-10-13
Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.
CVSS Score
6.8
EPSS Score
0.005
Published
2026-10-13
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
CVSS Score
7.0
EPSS Score
0.003
Published
2026-10-13
Deadlock in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to deny service over a network.
CVSS Score
7.5
EPSS Score
0.01
Published
2026-10-13
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
CVSS Score
7.0
EPSS Score
0.003
Published
2026-10-13
Buffer over-read in Windows Broadcast DVR User Service allows an authorized attacker to disclose information locally.
CVSS Score
5.5
EPSS Score
0.004
Published
2026-10-13
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Credential Providers allows an authorized attacker to elevate privileges locally.
CVSS Score
7.8
EPSS Score
0.002
Published
2026-10-13