Microsoft Office 2021 vulnerabilities
434 vulnerabilities
Known vulnerabilities in Microsoft Office 2021, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2026-102850microsoft365_apps+5
EPSS score0.63%
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.CVE-2026-102849microsoft365_apps+5EPSS score0.63%
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.CVE-2026-97780microsoft365_apps+10EPSS score0.78%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97779microsoft365_apps+10EPSS score0.83%
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.CVE-2026-97778microsoft365_apps+10EPSS score0.59%
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97777microsoft365_apps+10EPSS score0.72%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97776microsoft365_apps+10EPSS score0.78%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97775microsoft365_apps+10EPSS score0.72%
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97773microsoft365_apps+10EPSS score0.72%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97772microsoft365_apps+10EPSS score0.72%
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97771microsoft365_apps+10EPSS score0.72%
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97770microsoft365_apps+10EPSS score0.72%
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97769microsoft365_apps+10EPSS score0.76%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97768microsoft365_apps+10EPSS score0.72%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97767microsoft365_apps+10EPSS score0.59%
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97766microsoft365_apps+10EPSS score0.72%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97765microsoft365_apps+10EPSS score0.78%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97763microsoft365_apps+10EPSS score0.72%
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97762microsoft365_apps+10EPSS score0.72%
Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.CVE-2026-97761microsoft365_apps+8EPSS score0.78%
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.