CVE-2017-0022
Published: May 24, 2022
Official Description
Microsoft XML Core Services (MSXML) improperly handles objects in memory, allowing attackers to test for files on disk via a crafted web site.
CISA KEV Advisory
Microsoft XML Core Services Information Disclosure Vulnerability
Microsoft XML Core Services (MSXML) improperly handles objects in memory, allowing attackers to test for files on disk via a crafted web site.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Microsoft XML Core Services (MSXML) allows an attacker to check for the presence of files on a system by tricking a user into visiting a malicious website. Given its high EPSS score of 0.42086 and inclusion in CISA's KEV, active exploitation is highly likely and confirmed. This makes it an urgent concern for systems using MSXML.
Active exploitation of this vulnerability has been observed in the wild and it is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog. Attackers can exploit this remotely via a crafted website.
Ensure all Microsoft XML Core Services installations are updated to the latest available versions. Implement robust web browsing security policies and user awareness training to prevent visits to malicious websites.
Technical Analysis
CVE-2017-0022 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2017-0022 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-0022 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1