KB5040438

Microsoft security update released 2024-09-10. Fixes 87 CVEs.

CriticalCISA KEV

Download KB5040438

Get the official update for KB5040438. The download and file size for each supported product are on the Microsoft Update Catalog page.

Microsoft Update Catalog: download KB5040438 Microsoft support article

Update summary

Released

2024-09-10

CVEs fixed

Max CVSS

9.8

Severity

Critical

Exploitation and severity

Fixes 87 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 84%.

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 KB5040438 is missing on your devices.

CVEs fixed by this update

CVE-2024-21417 CVE-2024-26184 CVE-2024-28899 CVE-2024-30013 CVE-2024-30071 CVE-2024-30079 CVE-2024-30081 CVE-2024-35270 CVE-2024-3596 CVE-2024-37969 CVE-2024-37970 CVE-2024-37971 CVE-2024-37972 CVE-2024-37973 CVE-2024-37974 CVE-2024-37975 CVE-2024-37977 CVE-2024-37978 CVE-2024-37981 CVE-2024-37984 CVE-2024-37986 CVE-2024-37987 CVE-2024-37988 CVE-2024-37989 CVE-2024-38010 CVE-2024-38011 CVE-2024-38013 CVE-2024-38015 CVE-2024-38017 CVE-2024-38019 CVE-2024-38022 CVE-2024-38025 CVE-2024-38027 CVE-2024-38028 CVE-2024-38031 CVE-2024-38033 CVE-2024-38034 CVE-2024-38041 CVE-2024-38043 CVE-2024-38044 CVE-2024-38047 CVE-2024-38048 CVE-2024-38049 CVE-2024-38050 CVE-2024-38051 CVE-2024-38052 CVE-2024-38053 CVE-2024-38054 CVE-2024-38055 CVE-2024-38056 CVE-2024-38057 CVE-2024-38058 CVE-2024-38059 CVE-2024-38060 CVE-2024-38061 CVE-2024-38062 CVE-2024-38064 CVE-2024-38065 CVE-2024-38067 CVE-2024-38068 CVE-2024-38069 CVE-2024-38070 CVE-2024-38071 CVE-2024-38072 CVE-2024-38073 CVE-2024-38074 CVE-2024-38076 CVE-2024-38077 CVE-2024-38079 CVE-2024-38080 CVE-2024-38081 CVE-2024-38085 CVE-2024-38091 CVE-2024-38100 CVE-2024-38101 CVE-2024-38102 CVE-2024-38104 CVE-2024-38105 CVE-2024-38112 CVE-2024-38184 CVE-2024-38185 CVE-2024-38186 CVE-2024-38187 CVE-2024-38191 CVE-2024-38517 CVE-2024-39684 CVE-2024-43495

Affected products

Windows 11 Version 22H2 for ARM64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems

References

Microsoft support article Microsoft Security Update Guide

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