CVE-2019-0541
Published: November 3, 2021
Official Description
Microsoft MSHTML engine contains an improper input validation vulnerability that allows for remote code execution vulnerability.
CISA KEV Advisory
Microsoft MSHTML Remote Code Execution Vulnerability
Microsoft MSHTML engine contains an improper input validation vulnerability that allows for remote code execution vulnerability.
Apply updates per vendor instructions.
Risk Analysis
Microsoft's MSHTML engine is affected by an improper input validation vulnerability that can lead to remote code execution. With an EPSS score of 0.80937 and confirmed exploitation, this is a critical vulnerability that could allow attackers to take control of affected systems.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, indicating a high likelihood of successful attacks. The remote code execution capability makes it a severe threat.
Ensure all Microsoft products utilizing the MSHTML engine are fully patched with the latest security updates. Implement robust web filtering and email security to prevent users from accessing malicious content.
Technical Analysis
CVE-2019-0541 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-2019-0541 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-2019-0541 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