CVE-2026-45638

HighCVSS 7.8/10Last modified Jul 23, 2026

Description

Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

No affected versions have been published.

Timeline

Published
Jun 9, 2026
Last modified
Jul 23, 2026
NVD status
Modified

Related CVEs from 2026

CVE-2026-456397.5Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.CVE-2026-45644.7A security vulnerability has been detected in yangzongzhuan RuoYi up to 4.8.2. This issue affects some unknown processing of the file /monitCVE-2026-456407.0Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.CVE-2026-456417.8Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.CVE-2026-456423.9Improper input validation in Microsoft Azure Attestation service and Device Health Attestation Service allows an authorized attacker to perfCVE-2026-456437.8Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.CVE-2026-456448.0Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Live Share Canvas SDK allows an authorizedCVE-2026-456457.8Untrusted pointer dereference in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-456467.5Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.CVE-2026-456477.0Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locCVE-2026-456488.8Stack-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.CVE-2026-456497.1Improper access control in Office for Android allows an unauthorized attacker to perform spoofing locally.
CVE-2026-45638: High severity, CVSS 7.8 | Vulnix