CVE-2026-40359
Microsoft Excel Remote Code Execution vulnerability
MSRC advisory May 12, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-40359
- Affected products
- Microsoft Excel Remote Code Execution · Microsoft Microsoft Excel Remote Code Execution · Microsoft
What happened
Use after free 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-2026-40359) was added to Microsoft’s security update guidance. Use after free 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
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Need help patching?
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