CVE-2026-64909
Microsoft Office Remote Code Execution vulnerability
MSRC advisory August 11, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-64909
- Affected products
- Microsoft Office Remote Code Execution · Microsoft Microsoft Office Remote Code Execution · Microsoft
What happened
Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
What it means for your business
Microsoft Office Remote Code Execution vulnerability (CVE-2026-64909) was added to Microsoft’s security update guidance. Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally. If you need help checking exposure, call (864) 335-9223.
Sources
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