CVE-2026-81959: Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Excel Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.20976 - Upgrade
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Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
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Fixed in 16.0.14334.20906 - Upgrade
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Fixed in 16.0.10417.20207 - Upgrade
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Fixed in 16.0.20326.20140 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002904 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.113.26091433
Event History
Frequently Asked Questions
What access and conditions does an attacker need to exploit this issue?
The attack vector is local, so the attacker needs local access to the affected system. No privileges are required, but user interaction is required for exploitation.
What is the potential impact of successful exploitation?
Successful exploitation can allow local code execution. The supplied vector rates confidentiality, integrity, and availability impact as high.