# CVE-2020-1433: Microsoft Edge PDF Information Disclosure Vulnerability CVE-2020-1433 is fixed in 24 products on 1 platform, first by KB4565511, released July 14, 2020. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2020-1433 - Priority: Routine - CVSS: 4.3 (Important) - EPSS: 0.0529 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Jul 14, 2020 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1433 ## Description

An information disclosure vulnerability exists when Microsoft Edge PDF Reader improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.

To exploit the vulnerability, in a web-based attack scenario, an attacker could host a website that contains malicious PDF content. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted PDF content that could exploit the vulnerability. However, in all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action. For example, an attacker could trick a user into clicking a link that takes the user to the attacker's site.

The security update addresses the vulnerability by modifying how Microsoft Edge PDF Reader handles objects in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 14393.3808 | [KB4565511](https://patchblox.com/security/data/fix/microsoft/kb4565511.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 14393.3808 | [KB4565511](https://patchblox.com/security/data/fix/microsoft/kb4565511.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.1992 | [KB4565508](https://patchblox.com/security/data/fix/microsoft/kb4565508.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems | 16299.1992 | [KB4565508](https://patchblox.com/security/data/fix/microsoft/kb4565508.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.1992 | [KB4565508](https://patchblox.com/security/data/fix/microsoft/kb4565508.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.1610 | [KB4565489](https://patchblox.com/security/data/fix/microsoft/kb4565489.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 17134.1610 | [KB4565489](https://patchblox.com/security/data/fix/microsoft/kb4565489.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.1610 | [KB4565489](https://patchblox.com/security/data/fix/microsoft/kb4565489.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for 32-bit Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for ARM64-based Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for x64-based Systems | | [KB4565483](https://patchblox.com/security/data/fix/microsoft/kb4565483.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 2004 for 32-bit Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 2004 for ARM64-based Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 2004 for x64-based Systems | 19041.388 | [KB4565503](https://patchblox.com/security/data/fix/microsoft/kb4565503.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.18638 | [KB4565513](https://patchblox.com/security/data/fix/microsoft/kb4565513.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.18638 | [KB4565513](https://patchblox.com/security/data/fix/microsoft/kb4565513.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2016 | 14393.3808 | [KB4565511](https://patchblox.com/security/data/fix/microsoft/kb4565511.md) | Jul 14, 2020 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 17763.1339 | [KB4558998](https://patchblox.com/security/data/fix/microsoft/kb4558998.md) | Jul 14, 2020 | --- Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.