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CVE-2026-20950

Microsoft Excel Remote Code Execution Vulnerability

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-20957

Microsoft Excel Remote Code Execution Vulnerability

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-21259

Microsoft Excel Elevation of Privilege Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 6 more
CVE-2026-21258

Microsoft Excel Information Disclosure Vulnerability

Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-21261

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-26109

Microsoft Excel Remote Code Execution Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 10 more
CVE-2026-26108

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-26107

Microsoft Excel Remote Code Execution Vulnerability

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-26112

Microsoft Excel Remote Code Execution Vulnerability

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2025-30375

Microsoft Excel Remote Code Execution Vulnerability

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2025-30383

Microsoft Excel Remote Code Execution Vulnerability

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2025-32704

Microsoft Excel Remote Code Execution Vulnerability

Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 5 more
CVE-2025-47165

Microsoft Excel Remote Code Execution Vulnerability

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS 2.3% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2025-53741

Microsoft Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 365 Apps Excel and 13 more
CVE-2025-53735

Microsoft Excel Remote Code Execution Vulnerability

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 365 Apps Excel and 12 more