CVE-2019-0604
Published: November 3, 2021
Official Description
Microsoft SharePoint fails to check the source markup of an application package. An attacker who successfully exploits the vulnerability could run remote code in the context of the SharePoint application pool and the SharePoint server farm account.
CISA KEV Advisory
Microsoft SharePoint Remote Code Execution Vulnerability
Microsoft SharePoint fails to check the source markup of an application package. An attacker who successfully exploits the vulnerability could run remote code in the context of the SharePoint application pool and the SharePoint server farm account.
Apply updates per vendor instructions.
Risk Analysis
Microsoft SharePoint contains a vulnerability where it fails to properly validate application package markup, allowing an attacker to execute remote code. This could lead to compromise of the SharePoint application pool and server farm account, and the high EPSS score of 0.94415 indicates a very high likelihood of exploitation.
This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog, confirming its confirmed exploitation. The remote code execution capability makes it a severe threat.
Apply the latest security updates for Microsoft SharePoint. Implement strict validation for application packages and follow Microsoft's security best practices for SharePoint deployments.
Technical Analysis
CVE-2019-0604 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-2019-0604 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-2019-0604 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