Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities

Key Points:

• Microsoft’s June 2026 Patch Tuesday addresses 206 vulnerabilities, with 32 classified as critical, including multiple remote code execution (RCE) vulnerabilities across various Windows services and applications.
• Critical vulnerabilities such as CVE-2026-42985 (RCE in Remote Desktop Client) and CVE-2026-47291 (RCE in HTTP Protocol Stack) could allow unauthorized attackers to execute code remotely, impacting systems like Windows Active Directory, Hyper-V, and Microsoft Office.
• Immediate actions include applying the latest security updates from Microsoft and updating Snort rulesets to detect exploitation attempts against these vulnerabilities.

Technical Details: Notably, CVE-2026-42985 allows RCE via a heap-based buffer overflow in the Remote Desktop Client, while CVE-2026-47291 involves an integer overflow in the HTTP Protocol Stack. Both can be exploited remotely without user interaction.

MITRE ATT&CK Techniques:

• T1203 - Exploitation for Client Execution (Execution)
• T1068 - Exploit Public-Facing Application (Initial Access)
• T1075 - Pass the Hash (Credential Access)

IOCs Mentioned: None mentioned.