Microsoft Msxml 4.20.9818.0 May 2026

This software is considered and a significant security risk.

You likely didn't install this manually. It usually arrives in one of two ways:

Older applications (like Toad for Oracle, SQL Server tools, or older games) install it as a necessary dependency. Microsoft Msxml 4.20.9818.0

Microsoft officially ended support for MSXML 4.0 in April 2014 .

Microsoft MSXML 4.20.9818.0 is a specific version of . It is an older system component used by legacy Windows applications to parse and process XML data. Critical Status: Obsolete and Insecure This software is considered and a significant security risk

4.20.9818.0 is an older sub-version of SP2. Even the "newer" SP3 (version 4.30.2100.0) is also now unsupported. 🛠️ Why is it on your computer?

Because it no longer receives updates, it is frequently flagged by security scanners (like Nessus or Qualys) as a vulnerability. Microsoft officially ended support for MSXML 4

It was commonly included in or updated via Windows XP, Vista, and Windows 7. ✅ Should you keep or remove it? Microsoft XML Core Services 4.0 - Microsoft Lifecycle