Microsoft Office 365 For Mac vulnerabilities

CVE-2026-81955 [HIGH] CWE-122 CVE-2026-81955: Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execut Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

CVE-2026-81952 [HIGH] CWE-122 CVE-2026-81952: Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78526 [HIGH] CWE-122 CVE-2026-78526: Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78514 [HIGH] CWE-416 CVE-2026-78514: Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a netwo Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78517 [HIGH] CWE-122 CVE-2026-78517: Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78521 [HIGH] CWE-122 CVE-2026-78521: Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78507 [HIGH] CWE-416 CVE-2026-78507: Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a netwo Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-78518 [HIGH] CWE-20 CVE-2026-78518: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

CVE-2026-78512 [HIGH] CWE-122 CVE-2026-78512: Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code ov Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-80085 [HIGH] CWE-122 CVE-2026-80085: Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-65807 [HIGH] CWE-843 CVE-2026-65807: 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 over a network.

CVE-2026-77901 [HIGH] CWE-476 CVE-2026-77901: Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code ov Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVE-2026-45458 [HIGH] CWE-416 CVE-2026-45458: Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVE-2026-45461 [HIGH] CWE-416 CVE-2026-45461: Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVE-2026-45472 [HIGH] CWE-416 CVE-2026-45472: Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVE-2026-45474 [HIGH] CWE-416 CVE-2026-45474: Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVE-2026-50387 [HIGH] CWE-121 CVE-2026-50387: Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges local Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.

CVE-2026-77898 [HIGH] CWE-122 CVE-2026-77898: Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.

CVE-2026-45456 [HIGH] CWE-843 CVE-2026-45456: 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-2026-45463 [HIGH] CWE-121 CVE-2026-45463: Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execut Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.