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7.8 — HIGH

Windows 11 security update fixes actively exploited zero-day flaw

📅 12 August 2026 at 08:58 UTC📰 Cyber InsiderView original source ↗
Windows 11 security update fixes actively exploited zero-day flaw

Microsoft has released the August 2026 cumulative update for Windows 11, fixing 236 Windows vulnerabilities, including a privilege-escalation flaw that is already being exploited in attacks. The KB5121003 update was released earlier today for Windows 11 versions 24H2, 25H2, and 26H1, bringing systems to builds 26100.9168 and 26200.9168. It is part of Microsoft’s broader August … The post Windows 11 security update fixes actively exploited zero-day flaw appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A zero-day vulnerability in Windows Ancillary Function Driver for WinSock (CVE-2026-68820) and a Windows User Profile Service elevation-of-privilege vulnerability (CVE-2026-62832) are being actively exploited by the North Korean threat group 'Lazarus' in campaigns targeting military organizations. Microsoft has released an update to fix these vulnerabilities.

⚙️Technical Details
CVEs
CVE-2026-68820CVE-2026-62832
Affected Systems
Windows 11 versions 24H2, 25H2, and 26H1
Attack Vectors
LOCAL
💥Impact Assessment
Severity: Critical
Who Is at Risk
Military organizations targeted by the North Korean threat group 'Lazarus'
🛡️Recommended Actions
1Install the August 2026 cumulative update for Windows 11 as soon as possible
2Back up important data in advance to reduce the risk of data loss if the installation encounters any issues
3Restart the system after installing the update
📦Affected Products
Windows 11
🔐NVD Verified DataVERIFIED
CVE-2026-68820 ↗CVSS 7 — HIGH
Attack Vector
LOCAL
Complexity
HIGH
Vector String
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416
CVE-2026-62832 ↗CVSS 7.8 — HIGH
Attack Vector
LOCAL
Complexity
LOW
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-59

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