Microsoft Excel vulnerabilities

CVE-2026-55048 [HIGH] CWE-122 CVE-2026-55048: Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-55039 [HIGH] CWE-122 CVE-2026-55039: Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-55949 [HIGH] CWE-908 CVE-2026-55949: Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute c Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2021-38655 [HIGH] CWE-416 CVE-2021-38655: Microsoft Excel Remote Code Execution Vulnerability Microsoft Excel Remote Code Execution Vulnerability

CVE-2020-16932 [HIGH] CWE-908 CVE-2020-16932: <p>A remote code execution vulnerability exists in Microsoft Excel software when the software fails A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of t

CVE-2020-16931 [HIGH] CWE-908 CVE-2020-16931: <p>A remote code execution vulnerability exists in Microsoft Excel software when the software fails A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of t

CVE-2020-16929 [HIGH] CWE-416 CVE-2020-16929: <p>A remote code execution vulnerability exists in Microsoft Excel software when the software fails A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of t

CVE-2004-0846 [HIGH] CVE-2004-0846: Unknown vulnerability in Microsoft Excel 2000, 2002, 2001 for Mac, and v.X for Mac allows remote att Unknown vulnerability in Microsoft Excel 2000, 2002, 2001 for Mac, and v.X for Mac allows remote attackers to execute arbitrary code via a malicious file containing certain parameters that are not properly validated.

CVE-2020-17128 [HIGH] CVE-2020-17128: Microsoft Excel Remote Code Execution Vulnerability Microsoft Excel Remote Code Execution Vulnerability

CVE-2016-7267 [MEDIUM] CWE-20 CVE-2016-7267: Microsoft Excel 2010 SP2, 2013 SP1, 2013 RT SP1, and 2016 misparses file formats, which makes it eas Microsoft Excel 2010 SP2, 2013 SP1, 2013 RT SP1, and 2016 misparses file formats, which makes it easier for remote attackers to execute arbitrary code via a crafted document, aka "Microsoft Office Security Feature Bypass Vulnerability."

CVE-2025-27750 [HIGH] CWE-416 CVE-2025-27750: Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-20946 [HIGH] CWE-125 CVE-2026-20946: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-24082 [HIGH] CWE-416 CVE-2025-24082: Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-24081 [HIGH] CWE-416 CVE-2025-24081: Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-60727 [HIGH] CWE-125 CVE-2025-60727: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-29979 [HIGH] CWE-122 CVE-2025-29979: Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-29977 [HIGH] CWE-416 CVE-2025-29977: Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-54899 [HIGH] CWE-590 CVE-2025-54899: Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-30376 [HIGH] CWE-122 CVE-2025-30376: Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2025-59231 [HIGH] CWE-843 CVE-2025-59231: Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an un Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.