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Microsoft Office Ltsc 2021 vulnerabilities

781 known vulnerabilities affecting microsoft/microsoft_office_ltsc_2021.

Total CVEs
781
CISA KEV
9
actively exploited
Public exploits
13
Exploited in wild
12
Severity breakdown
CRITICAL13HIGH581MEDIUM179LOW8

Vulnerabilities

Page 12 of 40
CVE-2026-26108P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-03-10
CVE-2026-26108 [HIGH] CWE-122 CVE-2026-26108: 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-2026-65661P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-65661 [HIGH] CWE-122 CVE-2026-65661: 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-2026-65664P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-65664 [HIGH] CWE-122 CVE-2026-65664: 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-2026-63513P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-63513 [HIGH] CWE-122 CVE-2026-63513: 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-2026-63533P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-63533 [HIGH] CWE-122 CVE-2026-63533: 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-2026-64898P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-64898 [HIGH] CWE-122 CVE-2026-64898: 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-2026-63519P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-08-11
CVE-2026-63519 [HIGH] CWE-122 CVE-2026-63519: 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-2026-55129P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55129 [HIGH] CWE-122 CVE-2026-55129: 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-2026-50301P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-50301 [HIGH] CWE-122 CVE-2026-50301: 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-2026-55120P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55120 [HIGH] CWE-122 CVE-2026-55120: Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
nvd
CVE-2026-55017P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55017 [HIGH] CWE-122 CVE-2026-55017: 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-2026-55056P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55056 [HIGH] CWE-122 CVE-2026-55056: 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-2026-55123P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55123 [HIGH] CWE-122 CVE-2026-55123: Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
nvd
CVE-2026-55140P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55140 [HIGH] CWE-122 CVE-2026-55140: 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-2026-55049P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55049 [HIGH] CWE-122 CVE-2026-55049: 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-2026-55043P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-07-14
CVE-2026-55043 [HIGH] CWE-122 CVE-2026-55043: Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
nvd
CVE-2026-44819P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-06-09
CVE-2026-44819 [HIGH] CWE-122 CVE-2026-44819: 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-2026-45475P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-06-09
CVE-2026-45475 [HIGH] CWE-122 CVE-2026-45475: 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-2026-44824P3HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2026-06-09
CVE-2026-44824 [HIGH] CWE-122 CVE-2026-44824: 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-2026-70220P3HIGHCVSS 7.8≥ 16.0.1, < 16.0.14334.209742026-10-13
CVE-2026-70220 [HIGH] CWE-122 CVE-2026-70220: 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
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Microsoft Office Ltsc 2021 vulnerabilities | cvebase