Microsoft Office Ltsc 2021 vulnerabilities
316 known vulnerabilities affecting microsoft/microsoft_office_ltsc_2021.
Total CVEs
316
CISA KEV
9
actively exploited
Public exploits
9
Exploited in wild
8
Severity breakdown
CRITICAL4HIGH268MEDIUM43LOW1
Vulnerabilities
Page 7 of 16
CVE-2025-47171MEDIUMCVSS 6.7PoC≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-06-10
CVE-2025-47171 [MEDIUM] CWE-20 CVE-2025-47171: Improper input validation in Microsoft Office Outlook allows an authorized attacker to execute code
Improper input validation in Microsoft Office Outlook allows an authorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-30379HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30379 [HIGH] CWE-763 CVE-2025-30379: Release of invalid pointer or reference in Microsoft Office Excel allows an unauthorized attacker to
Release of invalid pointer or reference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-30383HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30383 [HIGH] CWE-843 CVE-2025-30383: Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an un
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-30377HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30377 [HIGH] CWE-416 CVE-2025-30377: 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.
cvelistv5nvd
CVE-2025-30386HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30386 [HIGH] CWE-416 CVE-2025-30386: 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.
cvelistv5nvd
CVE-2025-29977HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-29977 [HIGH] CWE-416 CVE-2025-29977: 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.
cvelistv5nvd
CVE-2025-30375HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30375 [HIGH] CWE-843 CVE-2025-30375: Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an un
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-32704HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-32704 [HIGH] CWE-126 CVE-2025-32704: Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-30393HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30393 [HIGH] CWE-416 CVE-2025-30393: 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.
cvelistv5nvd
CVE-2025-29979HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-29979 [HIGH] CWE-122 CVE-2025-29979: 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.
cvelistv5nvd
CVE-2025-30376HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30376 [HIGH] CWE-122 CVE-2025-30376: 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.
cvelistv5nvd
CVE-2025-30381HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-30381 [HIGH] CWE-125 CVE-2025-30381: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-32705HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-05-13
CVE-2025-32705 [HIGH] CWE-125 CVE-2025-32705: Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code local
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-26642HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-26642 [HIGH] CWE-125 CVE-2025-26642: Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2025-29792HIGHCVSS 7.3≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-29792 [HIGH] CWE-416 CVE-2025-29792: Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2025-27749HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-27749 [HIGH] CWE-416 CVE-2025-27749: 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.
cvelistv5nvd
CVE-2025-29791HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-29791 [HIGH] CWE-843 CVE-2025-29791: 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.
cvelistv5nvd
CVE-2025-27748HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-27748 [HIGH] CWE-416 CVE-2025-27748: 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.
cvelistv5nvd
CVE-2025-27746HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-27746 [HIGH] CWE-416 CVE-2025-27746: 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.
cvelistv5nvd
CVE-2025-27745HIGHCVSS 7.8≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases2025-04-08
CVE-2025-27745 [HIGH] CWE-416 CVE-2025-27745: 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.
cvelistv5nvd