CVE-2018-8414
Published: March 25, 2022
Official Description
A remote code execution vulnerability exists when the Windows Shell does not properly validate file paths.
CISA KEV Advisory
Microsoft Windows Shell Remote Code Execution Vulnerability
A remote code execution vulnerability exists when the Windows Shell does not properly validate file paths.
Apply updates per vendor instructions.
Risk Analysis
A remote code execution vulnerability exists in Windows Shell due to improper validation of file paths. The very high EPSS score of 0.87930 indicates a strong likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation. This is a critical vulnerability that can allow an attacker to execute arbitrary code on affected systems.
This vulnerability is actively exploited in the wild. The flaw in file path validation suggests it is remotely exploitable, likely through specially crafted files or network shares.
Apply all available security updates for Microsoft Windows. Implement strict file path validation in applications and educate users about opening untrusted files.
Technical Analysis
CVE-2018-8414 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-2018-8414 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.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-8414 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