Microsoft Office Ltsc 2021 vulnerabilities
432 known vulnerabilities affecting microsoft/microsoft_office_ltsc_2021.
Total CVEs
432
CISA KEV
9
actively exploited
Public exploits
13
Exploited in wild
12
Severity breakdown
CRITICAL4HIGH352MEDIUM68LOW8
Vulnerabilities
Page 7 of 22
CVE-2026-55130P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55130 [HIGH] CWE-122 CVE-2026-55130: 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.
nvd
CVE-2026-55137P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55137 [HIGH] CWE-122 CVE-2026-55137: 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.
nvd
CVE-2026-55041P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55041 [HIGH] CWE-122 CVE-2026-55041: 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.
nvd
CVE-2026-55032P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55032 [HIGH] CWE-416 CVE-2026-55032: 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.
nvd
CVE-2026-55134P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55134 [HIGH] CWE-121 CVE-2026-55134: 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.
nvd
CVE-2026-55948P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55948 [HIGH] CWE-416 CVE-2026-55948: 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.
nvd
CVE-2026-55029P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55029 [HIGH] CWE-122 CVE-2026-55029: 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.
nvd
CVE-2026-55053P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55053 [HIGH] CWE-122 CVE-2026-55053: 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.
nvd
CVE-2026-54131P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
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.
nvd
CVE-2026-55037P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
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.
nvd
CVE-2026-55947P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
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.
nvd
CVE-2026-32198P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-04-14
CVE-2026-32198 [HIGH] CWE-416 CVE-2026-32198: 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.
nvd
CVE-2026-32199P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-04-14
CVE-2026-32199 [HIGH] CWE-416 CVE-2026-32199: 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.
nvd
CVE-2026-32197P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-04-14
CVE-2026-32197 [HIGH] CWE-416 CVE-2026-32197: 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.
nvd
CVE-2026-58618P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
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.
nvd
CVE-2025-47994P3HIGHCVSS 8.6≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-07-08
CVE-2025-47994 [HIGH] CWE-502 CVE-2025-47994: Deserialization of untrusted data in Microsoft Office allows an unauthorized attacker to elevate pri
Deserialization of untrusted data in Microsoft Office allows an unauthorized attacker to elevate privileges locally.
nvd
CVE-2025-24057P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-03-11
CVE-2025-24057 [HIGH] CWE-122 CVE-2025-24057: Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code local
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
nvd
CVE-2025-54908P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-09-09
CVE-2025-54908 [HIGH] CWE-416 CVE-2025-54908: 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.
nvd
CVE-2025-54904P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-09-09
CVE-2025-54904 [HIGH] CWE-416 CVE-2025-54904: 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.
nvd
CVE-2025-54896P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-09-09
CVE-2025-54896 [HIGH] CWE-416 CVE-2025-54896: 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.
nvd