Patch tracker / KB5075943

KB5075943

Microsoft security update released 2026-02-10. Fixes 27 CVEs.

HighCISA KEV

Download KB5075943

Get the official update for KB5075943. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5075943Microsoft support article

Update summary

Released
2026-02-10
CVEs fixed
27
Max CVSS
8.8
Severity
High

Exploitation and severity

Fixes 27 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 26%.

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

What to do

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. Senserva flags whether KB5075943 is missing on your devices.

CVEs fixed by this update

CVE-2026-20846CVE-2026-21222CVE-2026-21231CVE-2026-21234CVE-2026-21235CVE-2026-21236CVE-2026-21237CVE-2026-21238CVE-2026-21239CVE-2026-21240CVE-2026-21241CVE-2026-21242CVE-2026-21243CVE-2026-21244CVE-2026-21246CVE-2026-21247CVE-2026-21248CVE-2026-21249CVE-2026-21251CVE-2026-21253CVE-2026-21255CVE-2026-21508CVE-2026-21510CVE-2026-21513CVE-2026-21519CVE-2026-21525CVE-2026-21533

Affected products

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019

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.