CVE-2018-8634

Microsoft Text-To-Speech Remote Code Execution Vulnerability

CVE-2018-8634 is fixed in 21 products on 1 platform, first by KB4471321, released December 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
4.2
Critical
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1536
96th percentile

<p>A remote code execution vulnerability exists in Windows where Microsoft text-to-speech fails to properly handle objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>The security update addresses the vulnerability by correcting how the Microsoft text-to-speech handles objects in the memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1607 for 32-bit Systems 14393.2665 KB4471321 Dec 11, 2018
Windows 10 Version 1607 for x64-based Systems 14393.2665 KB4471321 Dec 11, 2018
Windows 10 Version 1703 for 32-bit Systems 15063.1506 KB4471327 Dec 11, 2018
Windows 10 Version 1703 for x64-based Systems 15063.1506 KB4471327 Dec 11, 2018
Windows 10 Version 1709 for 32-bit Systems 16299.846 KB4471329 Dec 11, 2018
Windows 10 Version 1709 for ARM64-based Systems 16299.846 KB4471329 Dec 11, 2018
Windows 10 Version 1709 for x64-based Systems 16299.846 KB4471329 Dec 11, 2018
Windows 10 Version 1803 for 32-bit Systems 17134.471 KB4471324 Dec 11, 2018
Windows 10 Version 1803 for ARM64-based Systems 17134.471 KB4471324 Dec 11, 2018
Windows 10 Version 1803 for x64-based Systems 17134.471 KB4471324 Dec 11, 2018
Windows 10 Version 1809 for 32-bit Systems 17763.194 KB4471332 Dec 11, 2018
Windows 10 Version 1809 for ARM64-based Systems 17763.194 KB4471332 Dec 11, 2018
Windows 10 Version 1809 for x64-based Systems 17763.194 KB4471332 Dec 11, 2018
Windows 10 for 32-bit Systems 10240.18063 KB4471323 Dec 11, 2018
Windows 10 for x64-based Systems 10240.18063 KB4471323 Dec 11, 2018
Windows Server 2016 14393.2665 KB4471321 Dec 11, 2018
Windows Server 2016 (Server Core installation) 14393.2665 KB4471321 Dec 11, 2018
Windows Server 2019 17763.194 KB4471332 Dec 11, 2018
Windows Server 2019 (Server Core installation) 17763.194 KB4471332 Dec 11, 2018
Windows Server, version 1709 (Server Core Installation) 16299.846 KB4471329 Dec 11, 2018
Windows Server, version 1803 (Server Core Installation) 17134.471 KB4471324 Dec 11, 2018