---
id: "CVE-2017-0022"
kind: "vulnerability"
aliases: ["CVE-2017-0022"]
title: "Microsoft XML Core Services: Microsoft XML Core Services Information Disclosure Vulnerability"
severity: "medium"
cvss: 6.5
epss: 0.18069
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft XML Core Services", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "internet-explorer", "msxml", "windows"]
not_affected_if: ["patched-windows"]
published_at: "2017-03-17T00:59:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0022", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-0022", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-0022", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Microsoft XML Core Services: Microsoft XML Core Services Information Disclosure Vulnerability

Microsoft XML Core Services (MSXML) mishandles objects in memory, letting a crafted web page test whether files exist on the victim's disk. The attacker gets file-existence information, not file contents.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft XML Core Services affected ? fixed ?

## Fix

Apply the Microsoft security update for MSXML per vendor instructions, as CISA requires.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0022
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2017-0022
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2017-0022

## From the sources

Microsoft XML Core Services (MSXML) in Windows 10 Gold, 1511, and 1607; Windows 7 SP1; Windows 8.1; Windows RT 8.1; Windows Server 2008 SP2 and R2 SP1; Windows Server 2012 Gold and R2; Windows Server 2016; and Windows Vista SP2 improperly handles objects in memory, allowing attackers to test for files on disk via a crafted web site, aka "Microsoft XML Information Disclosure Vulnerability."

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_