CVE-2026-40362
Microsoft Excel Remote Code Execution vulnerability
MSRC advisory May 12, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-40362
- Affected products
- Microsoft Excel Remote Code Execution · Microsoft Microsoft Excel Remote Code Execution · Microsoft
What happened
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
What it means for your business
Microsoft Excel Remote Code Execution vulnerability (CVE-2026-40362) was added to Microsoft’s security update guidance. Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
EPSS probability
0.33%
Sources
Related briefs
Microsoft Excel Remote Code Execution vulnerability
Microsoft Excel Remote Code Execution vulnerability (CVE-2026-68801) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Microsoft Office Remote Code Execution vulnerability
Microsoft Office Remote Code Execution vulnerability (CVE-2026-64903) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Microsoft Office Information Disclosure vulnerability
Microsoft Office Information Disclosure vulnerability (CVE-2026-64899) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege vulnerability
Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege vulnerability (CVE-2026-58547) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.