CVE-2018-8373
Published: March 25, 2022
Official Description
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer.
CISA KEV Advisory
Microsoft Scripting Engine Memory Corruption Vulnerability
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Internet Explorer's scripting engine allows for remote code execution when handling objects in memory. The high EPSS score of 0.82417 indicates a very high likelihood of exploitation, and its presence in CISA's KEV catalog confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild, making it a critical threat for Internet Explorer users. It is remotely exploitable.
Apply the latest security updates for Internet Explorer to mitigate this remote code execution vulnerability. Consider using modern, supported browsers.
Technical Analysis
CVE-2018-8373 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-2018-8373 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-2018-8373 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