microsoft microsoft 365 vulnerabilities (CVE)

CVE records published for microsoft microsoft 365, newest first. Follow to get an email when a new one appears.

393 results
8.8High
CVE-2026-118711

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

1.1%EPSS
8.8High
CVE-2026-118709

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118708

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Release of invalid pointer or reference in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

8.8High
CVE-2026-118707

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118705

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118704

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

8.8High
CVE-2026-118702

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

1.1%EPSS
8.8High
CVE-2026-118701

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

1.1%EPSS
8.8High
CVE-2026-118700

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

8.8High
CVE-2026-118302

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

7.5High
CVE-2026-118301

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

6.5Medium
CVE-2026-118300

Microsoft Office Excel Information Disclosure Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

1.0%EPSS
8.8High
CVE-2026-118299

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118298

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118297

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118296

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

1.1%EPSS
8.8High
CVE-2026-118295

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

8.8High
CVE-2026-118294

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

8.8High
CVE-2026-118292

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

1.1%EPSS
8.8High
CVE-2026-116927

Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

6.5Medium
CVE-2026-111292

Microsoft Office Excel Information Disclosure Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Office 365 for Mac; Microsoft Microsoft Office LTSC 2021; Microsoft Microsoft Office LTSC 2024

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

1.1%EPSS