Microsoft Office Ltsc 2021 vulnerabilities

CVE-2026-20950 [HIGH] CWE-416 CVE-2026-20950: 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-2026-21260 [HIGH] CWE-200 CVE-2026-21260: Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an una Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

CVE-2025-62554 [HIGH] CWE-843 CVE-2025-62554: 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-2025-62205 [HIGH] CWE-416 CVE-2025-62205: Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2025-62216 [HIGH] CWE-416 CVE-2025-62216: 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-2026-47642 [HIGH] CWE-416 CVE-2026-47642: 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-2026-55038 [HIGH] CWE-121 CVE-2026-55038: Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-33095 [HIGH] CWE-416 CVE-2026-33095: Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-32189 [HIGH] CWE-416 CVE-2026-32189: 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-2025-59238 [HIGH] CWE-416 CVE-2025-59238: Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locall Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

CVE-2025-59226 [HIGH] CWE-416 CVE-2025-59226: Use after free in Microsoft Office Visio allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Visio allows an unauthorized attacker to execute code locally.

CVE-2026-55127 [HIGH] CWE-122 CVE-2026-55127: 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 locally.

CVE-2026-56156 [HIGH] CWE-122 CVE-2026-56156: 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-2026-40359 [HIGH] CWE-416 CVE-2026-40359: 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-2026-40362 [HIGH] CWE-122 CVE-2026-40362: 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-2026-50675 [HIGH] CWE-122 CVE-2026-50675: 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-2026-32200 [HIGH] CWE-416 CVE-2026-32200: Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locall Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

CVE-2026-55055 [HIGH] CWE-121 CVE-2026-55055: Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-55128 [HIGH] CWE-416 CVE-2026-55128: Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-55131 [HIGH] CWE-122 CVE-2026-55131: 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.