Patch tracker / KB5070884

KB5070884

Microsoft security update released 2025-10-14. Fixes 1 CVE.

CriticalCISA KEV

Download KB5070884

Get the official update for KB5070884. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5070884Microsoft support article

Update summary

Released
2025-10-14
CVEs fixed
1
Max CVSS
9.8
Severity
Critical

Exploitation and severity

Fixes 1 CVE. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 100%.

Among the top 5% 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 KB5070884 is missing on your devices.

CVEs fixed by this update

CVE-2025-59287

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.