CVE-2026-81959
Microsoft Excel Remote Code Execution vulnerability
MSRC advisory September 8, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-81959
- CWE
- CWE-122CWE-190
- Affected products
- Microsoft Excel Remote Code Execution · Microsoft Microsoft Excel Remote Code Execution · Microsoft
What happened
<p>Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.</p>
What it means for your business
Microsoft Excel Remote Code Execution vulnerability (CVE-2026-81959) was added to Microsoft’s security update guidance. <p>Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.</p> If you need help checking exposure, call (864) 335-9223.
CVSS score
7.8 (High)
EPSS probability
0.43%
Sources
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