Microsoft Office Ltsc For Mac 2021 CVEs and Security Vulnerabilities

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CVE-2026-56192

Microsoft Office Information Disclosure Vulnerability

Out-of-bounds read 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 Microsoft 365 Apps For Enterprise and 17 more

CVE-2026-55121

Microsoft Office Information Disclosure Vulnerability

Out-of-bounds read 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 Microsoft 365 Apps For Enterprise and 19 more

CVE-2026-55045

Microsoft Office Remote Code Execution Vulnerability

Out-of-bounds read 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 Microsoft 365 Microsoft 365 Apps For Enterprise and 17 more

CVE-2026-55136

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 12 more

CVE-2026-55035

Microsoft Office Information Disclosure Vulnerability

Out-of-bounds read 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 Microsoft 365 Apps For Enterprise and 17 more

CVE-2026-55120

Microsoft PowerPoint Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office PowerPoint 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 Microsoft 365 Apps For Enterprise and 11 more

CVE-2026-55137

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 13 more

CVE-2026-55899

Microsoft Excel Remote Code Execution Vulnerability

Stack-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 13 more

CVE-2026-55947

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 12 more

CVE-2026-45643

Microsoft Word Remote Code Execution Vulnerability

Untrusted pointer dereference in Microsoft Office Word 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 Microsoft 365 Apps For Enterprise and 10 more

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