Microsoft · Security update · August 14, 2018

KB4343888: August 2018 security update

KB4343888, released August 14, 2018, fixes 12 CVEs across 4 products. One of them is being exploited (CVE-2018-8405); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEVKnown ransomware use
CVEs closed
12
2 rated Critical
Exploited
1
CVE-2018-8405
Exploitation more likely
3
Vendor assessment
Highest EPSS
0.2340
97th percentile

Priority of the 12 CVEs

Patch now 1 Urgent 3 High 3 Routine 5

Applies to

Product
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Patch now CVE-2018-8405 Microsoft Graphics Component Elevation of Privilege 7.0 0.0344 KEVRansomwareExploited
Urgent CVE-2018-8344 Microsoft Graphics Component Remote Code Execution 7.8 0.2298 More likely
Urgent CVE-2018-8345 Microsoft Windows Remote Code Execution 7.5 0.1490 More likely
Urgent CVE-2018-8404 Windows Kernel Elevation of Privilege 7.0 0.0122 More likely
High CVE-2018-8349 Windows COM Remote Code Execution 7.0 0.2340 Exploitation Less Likely
High CVE-2018-8343 Windows NDIS Elevation of Privilege 7.0 0.0129 Exploitation Less Likely
High CVE-2018-8339 Windows Installer Elevation of Privilege 7.4 0.0116 Exploitation Less Likely
Routine CVE-2018-8394 Microsoft Graphics Component Information Disclosure 4.7 0.0851 Exploitation Less Likely
Routine CVE-2018-8398 Microsoft Graphics Component Information Disclosure 4.7 0.0851 Exploitation Less Likely
Routine CVE-2018-8340 Windows Authentication Methods Security Feature Bypass 6.5 0.0789 Exploitation Less Likely
Routine CVE-2018-8341 Windows Kernel Information Disclosure 4.7 0.0285 Exploitation Less Likely
Routine CVE-2018-8348 Windows Kernel Information Disclosure 4.7 0.0235 Exploitation Less Likely
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