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CVE-2026-55042

Microsoft Office Information Disclosure Vulnerability

Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information locally.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Microsoft 365 Office 2016 and 6 more
CVE-2026-55133

Microsoft OneNote Remote Code Execution Vulnerability

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

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Microsoft 365 Office 2021 and 4 more
CVE-2026-56193

Microsoft Office Information Disclosure Vulnerability

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

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Microsoft 365 Office 2016 and 6 more
CVE-2026-55948

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-2026-45463

Microsoft Office Remote Code Execution Vulnerability

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

CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps 365 Copilot Microsoft 365 and 8 more
CVE-2026-45455

Microsoft Excel Information Disclosure Vulnerability

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

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 9 more
CVE-2026-45645

Microsoft Office Remote Code Execution Vulnerability

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

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Microsoft 365 Office 2016 and 6 more
CVE-2026-45460

Microsoft Office Information Disclosure Vulnerability

Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information locally.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps 365 Copilot Microsoft 365 and 7 more
CVE-2026-44823

Microsoft Excel Remote Code Execution Vulnerability

Numeric truncation error 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-2026-44820

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 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-44818

Microsoft Excel Remote Code Execution Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Excel 2016 and 8 more
CVE-2026-44817

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