CVE-2026-66804

HighCVSS 7.8/10Last modified Aug 14, 2026

Description

Improper access control in Windows Cross Device Service 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-284

Affected software

No affected versions have been published.

Timeline

Published
Aug 11, 2026
Last modified
Aug 14, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-668058.8Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.CVE-2026-668065.5Off-by-one error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.CVE-2026-668077.8Stack-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-668088.8Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.CVE-2026-668095.5Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.CVE-2026-66815.3The PKCS#7 decode path ignores the caller-supplied output buffer size (outputSz), allowing decoded content to be written past the bounds of CVE-2026-668105.5Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to disclose information locally.CVE-2026-668148.8Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.CVE-2026-668166.5Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.CVE-2026-668188.8Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.CVE-2026-668198.8Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate CVE-2026-66827.6In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mount_volume() where fasize *= fs->n_fats can wrap, leading to attacker-
CVE-2026-66804: High severity, CVSS 7.8 | Vulnix