CVE-2020-1380
Published: November 3, 2021
Official Description
Microsoft Internet Explorer contains a memory corruption vulnerability which can allow for remote code execution in the context of the current user.
CISA KEV Advisory
Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability
Microsoft Internet Explorer contains a memory corruption vulnerability which can allow for remote code execution in the context of the current user.
Apply updates per vendor instructions.
Risk Analysis
This memory corruption vulnerability in Microsoft Internet Explorer can lead to remote code execution in the context of the current user. It is a high-severity issue with a very high EPSS score of 0.91733, indicating a significant likelihood of exploitation, and is confirmed to be actively exploited.
This vulnerability is actively being exploited in the wild. Given its nature, it is likely remotely exploitable.
Users should update Microsoft Internet Explorer to the latest patched version or consider using alternative, more secure browsers.
Technical Analysis
CVE-2020-1380 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-2020-1380 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-2020-1380 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