CVE-2020-0878
Published: November 3, 2021
Official Description
Microsoft Edge and Internet Explorer contain a memory corruption vulnerability that allows attackers to execute code in the context of the current user.
CISA KEV Advisory
Microsoft Edge and Internet Explorer Memory Corruption Vulnerability
Microsoft Edge and Internet Explorer contain a memory corruption vulnerability that allows attackers to execute code in the context of the current user.
Apply updates per vendor instructions.
Risk Analysis
Microsoft Edge and Internet Explorer contain a memory corruption vulnerability that allows attackers to execute code in the context of the current user. This high-severity flaw has a significant exploitation probability (EPSS 0.09821), indicating a strong likelihood of exploitation. This vulnerability is confirmed to be actively exploited by CISA.
This vulnerability is being actively exploited in the wild. Exploitation typically occurs when a user visits a malicious website.
Update Microsoft Edge and Internet Explorer to the latest available versions. Encourage users to practice safe browsing habits and use modern, supported browsers.
Technical Analysis
CVE-2020-0878 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-2020-0878 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-2020-0878 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