# CVE-2020-0908: Windows Text Service Module Remote Code Execution Vulnerability CVE-2020-0908 is fixed in 27 products on 1 platform, first by KB4577015, released September 8, 2020. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2020-0908 - Priority: Urgent - CVSS: 7.5 (Critical) - EPSS: 0.0326 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Sep 8, 2020 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0908 ## Description

A remote code execution vulnerability exists when the Windows Text Service Module improperly handles memory. An attacker who successfully exploited the vulnerability could gain execution on a victim system.

An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge (Chromium-based), and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements by adding specially crafted content that could exploit the vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by way of enticement in an email or Instant Messenger message, or by getting them to open an attachment sent through email.

The security update addresses the vulnerability by correcting how the Windows Text Service Module handles memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.3930 | [KB4577015](https://patchblox.com/security/data/fix/microsoft/kb4577015.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3930 | [KB4577015](https://patchblox.com/security/data/fix/microsoft/kb4577015.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.2107 | [KB4577041](https://patchblox.com/security/data/fix/microsoft/kb4577041.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.2107 | [KB4577041](https://patchblox.com/security/data/fix/microsoft/kb4577041.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.2107 | [KB4577041](https://patchblox.com/security/data/fix/microsoft/kb4577041.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1726 | [KB4577032](https://patchblox.com/security/data/fix/microsoft/kb4577032.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1726 | [KB4577032](https://patchblox.com/security/data/fix/microsoft/kb4577032.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1726 | [KB4577032](https://patchblox.com/security/data/fix/microsoft/kb4577032.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1457 | [KB4570333](https://patchblox.com/security/data/fix/microsoft/kb4570333.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1457 | [KB4570333](https://patchblox.com/security/data/fix/microsoft/kb4570333.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1457 | [KB4570333](https://patchblox.com/security/data/fix/microsoft/kb4570333.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1909 for 32-bit Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1909 for ARM64-based Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 1909 for x64-based Systems | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 2004 for 32-bit Systems | 19041.508 | [KB4571756](https://patchblox.com/security/data/fix/microsoft/kb4571756.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 2004 for ARM64-based Systems | 19041.508 | [KB4571756](https://patchblox.com/security/data/fix/microsoft/kb4571756.md) | Sep 8, 2020 | | Microsoft | Windows 10 Version 2004 for x64-based Systems | 19041.508 | [KB4571756](https://patchblox.com/security/data/fix/microsoft/kb4571756.md) | Sep 8, 2020 | | Microsoft | Windows Server 2016 | 14393.3930 | [KB4577015](https://patchblox.com/security/data/fix/microsoft/kb4577015.md) | Sep 8, 2020 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3930 | [KB4577015](https://patchblox.com/security/data/fix/microsoft/kb4577015.md) | Sep 8, 2020 | | Microsoft | Windows Server 2019 | 17763.1457 | [KB4570333](https://patchblox.com/security/data/fix/microsoft/kb4570333.md) | Sep 8, 2020 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.1457 | [KB4570333](https://patchblox.com/security/data/fix/microsoft/kb4570333.md) | Sep 8, 2020 | | Microsoft | Windows Server, version 1903 (Server Core installation) | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows Server, version 1909 (Server Core installation) | | [KB4574727](https://patchblox.com/security/data/fix/microsoft/kb4574727.md) | Sep 8, 2020 | | Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.508 | [KB4571756](https://patchblox.com/security/data/fix/microsoft/kb4571756.md) | Sep 8, 2020 | --- Data as of 2026-11-08T00:53:09Z UTC. 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