hacker-news · Crawled Aug 11, 2026

Microsoft Patches 398 Flaws Including a Windows Driver Zero-Day Under Active Attack

1 Actors
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AI Summary

Microsoft's August 2026 security update addresses 398 vulnerabilities, including CVE-2026-68820, a Windows kernel driver zero-day under active exploitation for privilege escalation. The flaw exists in afd.sys and allows attackers with initial code execution to escalate to SYSTEM privileges. Check Point Research attributes the exploitation to the Lazarus Group in their 'Operation Dream Job' campaign. Four additional critical unauthenticated remote code execution flaws in Windows DNS Server, Windows Deployment Services, Microsoft QUIC, and HPC Pack are also patched but were not under active attack at release. The update also completes a SharePoint exploit chain by fixing CVE-2026-63520, the RCE component that, when combined with July's authentication bypass (CVE-2026-55040), enabled unauthenticated RCE.

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Extracted Entities 1 found

Threat Actor Lazarus Group →

MITRE ATT&CK TTPs 45 techniques

T1001 Data Obfuscation · Command And Control T1003 OS Credential Dumping · Credential Access T1018 Remote System Discovery · Discovery T1021.001 Remote Desktop Protocol · Lateral Movement T1021.002 SMB/Windows Admin Shares · Lateral Movement T1021.004 SSH · Lateral Movement T1027 Obfuscated Files or Information · Defense Evasion T1029 Scheduled Transfer · Exfiltration T1040 Network Sniffing · Credential Access T1053.005 Scheduled Task · Execution T1055 Process Injection · Defense Evasion T1059 Command and Scripting Interpreter · Execution T1059.001 PowerShell · Execution T1068 Exploitation for Privilege Escalation · Privilege Escalation T1070.001 Clear Windows Event Logs · Defense Evasion T1071.001 Web Protocols · Command And Control T1078 Valid Accounts · Defense Evasion T1082 System Information Discovery · Discovery T1085 T1085 T1087 Account Discovery · Discovery T1090 Proxy · Command And Control T1098 Account Manipulation · Persistence T1105 Ingress Tool Transfer · Command And Control T1129 Shared Modules · Execution T1133 External Remote Services · Persistence T1134 Access Token Manipulation · Defense Evasion T1190 Exploit Public-Facing Application · Initial Access T1195.002 Compromise Software Supply Chain · Initial Access T1203 Exploitation for Client Execution · Execution T1204.002 Malicious File · Execution T1210 Exploitation of Remote Services · Lateral Movement T1218 System Binary Proxy Execution · Defense Evasion T1218.011 Rundll32 · Defense Evasion T1480 Execution Guardrails · Defense Evasion T1485 Data Destruction · Impact T1486 Data Encrypted for Impact · Impact T1495 Firmware Corruption · Impact T1534 Internal Spearphishing · Lateral Movement T1548 Abuse Elevation Control Mechanism · Privilege Escalation T1557 Adversary-in-the-Middle · Credential Access T1566 Phishing · Initial Access T1566.001 Spearphishing Attachment · Initial Access T1566.002 Spearphishing Link · Initial Access T1583 Acquire Infrastructure · Resource Development T1610 Deploy Container · Defense Evasion