Microsoft 365 Copilot — known CVE vulnerabilities

Every CVE whose affected-product data names Microsoft 365 Copilot, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (52)

• CVE-2026-50517 — CVSS 9.9 (critical): Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
• CVE-2026-54130 — CVSS 9.8 (critical): Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
• CVE-2025-53766 — CVSS 9.8 (critical): Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
• CVE-2025-60724 — CVSS 9.8 (critical): Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
• CVE-2021-43905 — CVSS 9.6 (critical): Microsoft Office app Remote Code Execution Vulnerability
• CVE-2026-48561 — CVSS 9.6 (critical): Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized…
• CVE-2026-24307 — CVSS 9.3 (critical): Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
• CVE-2026-41106 — CVSS 9.3 (critical): Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-41090 — CVSS 9.3 (critical): Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to…
• CVE-2025-32711 — CVSS 9.3 (critical): Ai command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
• CVE-2026-33102 — CVSS 9.3 (critical): Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-47645 — CVSS 8.8 (high): Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate…
• CVE-2026-45461 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-62554 — CVSS 8.4 (high): Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-62557 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-40363 — CVSS 8.4 (high): Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-49697 — CVSS 8.4 (high): Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-30386 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-47162 — CVSS 8.4 (high): Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-47164 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-47167 — CVSS 8.4 (high): Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-47953 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-49695 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-49696 — CVSS 8.4 (high): Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-26110 — CVSS 8.4 (high): Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-45474 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-45472 — CVSS 8.4 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-45463 — CVSS 8.4 (high): Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-58617 — CVSS 8.1 (high): Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.
• CVE-2025-30388 — CVSS 7.8 (high): Heap-based buffer overflow in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.
• CVE-2024-38250 — CVSS 7.8 (high): Windows Graphics Component Elevation of Privilege Vulnerability
• CVE-2025-59234 — CVSS 7.8 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-42831 — CVSS 7.8 (high): Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-50387 — CVSS 7.8 (high): Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.
• CVE-2025-59227 — CVSS 7.8 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-53732 — CVSS 7.8 (high): Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-49702 — CVSS 7.8 (high): Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2026-26134 — CVSS 7.8 (high): Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
• CVE-2025-62199 — CVSS 7.8 (high): Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
• CVE-2025-26687 — CVSS 7.5 (high): Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-26133 — CVSS 7.1 (high): AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
• CVE-2026-24285 — CVSS 7.0 (high): Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
• CVE-2023-36565 — CVSS 7.0 (high): Microsoft Office Graphics Elevation of Privilege Vulnerability
• CVE-2026-42827 — CVSS 6.5 (medium): Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to…
• CVE-2026-42895 — CVSS 6.5 (medium): Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to…
• CVE-2026-41614 — CVSS 6.2 (medium): Improper access control in M365 Copilot for Desktop allows an unauthorized attacker to perform spoofing locally.
• CVE-2023-23391 — CVSS 5.5 (medium): Office for Android Spoofing Vulnerability
• CVE-2025-53799 — CVSS 5.5 (medium): Use of uninitialized resource in Windows Imaging Component allows an unauthorized attacker to disclose information locally.
• CVE-2026-25180 — CVSS 5.5 (medium): Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to disclose information locally.
• CVE-2026-24299 — CVSS 5.3 (medium): Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to…
• CVE-2026-45460 — CVSS 4.7 (medium): Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information locally.
• CVE-2026-41100 — CVSS 4.4 (medium): Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.