Patch tracker / KB5043055

KB5043055

Microsoft security update released 2024-09-10. Fixes 38 CVEs.

HighCISA KEV

Download KB5043055

Get the official update for KB5043055. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5043055Microsoft support article

Update summary

Released
2024-09-10
CVEs fixed
38
Max CVSS
8.8
Severity
High

Exploitation and severity

Fixes 38 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 8.8 (High). EPSS exploit probability up to 52%.

Among the top 25% 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 KB5043055 is missing on your devices.

CVEs fixed by this update

CVE-2024-21416CVE-2024-30073CVE-2024-38014CVE-2024-38045CVE-2024-38046CVE-2024-38119CVE-2024-38138CVE-2024-38217CVE-2024-38231CVE-2024-38234CVE-2024-38235CVE-2024-38236CVE-2024-38237CVE-2024-38238CVE-2024-38239CVE-2024-38240CVE-2024-38241CVE-2024-38242CVE-2024-38243CVE-2024-38244CVE-2024-38245CVE-2024-38246CVE-2024-38247CVE-2024-38248CVE-2024-38249CVE-2024-38250CVE-2024-38252CVE-2024-38253CVE-2024-38254CVE-2024-38257CVE-2024-38258CVE-2024-38259CVE-2024-38260CVE-2024-38263CVE-2024-43454CVE-2024-43455CVE-2024-43461CVE-2024-43467

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.