Patch tracker / Products / Microsoft Office LTSC 2021

Microsoft Office LTSC 2021: vulnerabilities and security updates

Every CVE affecting Microsoft Office LTSC 2021 and the Microsoft update (KB) that fixes it, ranked by real-world risk. Actively exploited (CISA KEV) first, then EPSS exploit probability, on top of CVSS severity.

CVEs
3
Updates (KBs)
5
Actively exploited (KEV)
1
Critical Severity
0

CVEs affecting Microsoft Office LTSC 2021

CVESeverityCVSSEPSSStatus
CVE-2024-38226High7.32.7%KEV
CVE-2025-62199High7.80.8%-
CVE-2026-65661High7.80.4%-

Updates (KBs) for Microsoft Office LTSC 2021

UpdateReleasedSeverityCVSSEPSSCVEsStatus
KB50025662024-09-10High7.32.7%1KEV
KB50028092025-11-11High7.80.8%1-
KB50027912026-08-11High7.80.3%1-
KB50027952026-08-11High7.80.3%1-
KB50029002026-08-11High7.80.3%1-

Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.

Most searched on Senserva right now

KB5099540: the full CVE list KB5099538: patch details KB5094123: the full CVE list KB5099539 install notes and severity CVE-2026-53412 exploit status KB5101650 download and what it fixes KB5120708 install notes and severity CVE-2026-55040 exploit status KB5101001: patch details KB5094128: the full CVE list
New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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