Patch tracker / KB5073699

KB5073699

Microsoft security update released 2026-01-13. Fixes 28 CVEs.

High

Download KB5073699

Get the official update for KB5073699. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5073699Microsoft support article

Update summary

Released
2026-01-13
CVEs fixed
28
Max CVSS
8.8
Severity
High

Exploitation and severity

Fixes 28 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 19%.

Among the top half of tracked Microsoft updates by EPSS exploit probability.

What to do

Elevated priority: high severity or a meaningful exploitation probability, sooner if an affected product is internet-facing. Senserva flags whether KB5073699 is missing on your devices.

CVEs fixed by this update

CVE-2023-31096CVE-2024-55414CVE-2026-0386CVE-2026-20816CVE-2026-20820CVE-2026-20821CVE-2026-20828CVE-2026-20831CVE-2026-20833CVE-2026-20834CVE-2026-20839CVE-2026-20840CVE-2026-20843CVE-2026-20847CVE-2026-20849CVE-2026-20860CVE-2026-20868CVE-2026-20869CVE-2026-20872CVE-2026-20875CVE-2026-20921CVE-2026-20922CVE-2026-20925CVE-2026-20927CVE-2026-20929CVE-2026-20931CVE-2026-20936CVE-2026-20940

Affected products

  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022

References

Microsoft support articleMicrosoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.