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critical advisory

Microsoft October 2026 Security Updates

Microsoft addressed 1,413 vulnerabilities including 75 critical flaws and an exploited zero-day (CVE-2026-96951) bypass in Windows Shell that circumvents Mark of the Web protections.

Windows +10 patch-tuesday vulnerability identity zero-day
3t 3c updated
medium advisory

XSL Script Execution via COM Interface in Microsoft Office

Adversaries may exploit Microsoft Office applications to execute malicious JScript or VBScript by leveraging the Microsoft.XMLDOM COM interface to process and transform XML documents using XSL scripts, potentially leading to initial access or defense evasion.

Microsoft Office +3 xsl-script com-interface office-macro
2r 5t
medium advisory

Suspicious MS Office Child Process

This rule detects suspicious child processes spawned by Microsoft Office applications, indicating potential exploitation or malicious macros used for initial access, command execution, defense evasion, and discovery activities.

Microsoft Office +3 initial-access execution defense-evasion discovery windows
2r 18t 1c
low advisory

Suspicious Image Load (taskschd.dll) from MS Office

Detection of taskschd.dll image loads from Microsoft Office applications indicates potential COM-based scheduled task creation for persistence, bypassing traditional schtasks.exe usage.

Word +4 persistence execution windows image_load scheduled_task
2r 2t
critical advisory

Microsoft Office Use-After-Free Vulnerability CVE-2026-32190

CVE-2026-32190 is a use-after-free vulnerability in Microsoft Office that allows an unauthorized attacker to execute code locally.

Microsoft Office +3 use-after-free microsoft-office code-execution cve-2026-32190
2r 3t 1c
low advisory

Suspicious Command Prompt Network Connection

This alert identifies suspicious network connections initiated by the command prompt (cmd.exe) when executed with arguments indicative of script execution, remote resource access, or originating from Microsoft Office applications, which is a common tactic for downloading payloads or establishing command and control.

Elastic Defend +7 command-prompt network-connection windows execution command-and-control
2r 4t