Microsoft Office 365 For Mac vulnerabilities

CVE-2026-54131 [HIGH] CWE-416 CVE-2026-54131: 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-2026-55037 [HIGH] CWE-122 CVE-2026-55037: 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-2026-55947 [HIGH] CWE-122 CVE-2026-55947: 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-2026-58618 [HIGH] CWE-122 CVE-2026-58618: 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-2026-55132 [HIGH] CWE-415 CVE-2026-55132: Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally. Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-55141 [HIGH] CWE-121 CVE-2026-55141: Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute cod Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-55899 [HIGH] CWE-20 CVE-2026-55899: Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute cod Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-55033 [HIGH] CWE-122 CVE-2026-55033: Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute c Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code locally.

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-2026-55024 [HIGH] CWE-843 CVE-2026-55024: 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.

CVE-2026-55022 [HIGH] CWE-843 CVE-2026-55022: Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthor Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

CVE-2026-44817 [HIGH] CWE-843 CVE-2026-44817: 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.

CVE-2026-45469 [HIGH] CWE-122 CVE-2026-45469: 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-2026-55036 [HIGH] CWE-126 CVE-2026-55036: Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-55025 [HIGH] CWE-843 CVE-2026-55025: 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.

CVE-2026-55031 [HIGH] CWE-125 CVE-2026-55031: 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-2026-44823 [HIGH] CWE-197 CVE-2026-44823: Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code l Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVE-2026-45457 [HIGH] CWE-125 CVE-2026-45457: Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally. Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.