CVE-2020-0878
Microsoft Edge and Internet Explorer Memory Corruption Vulnerability
Published Sep 11, 2020 · updated Jun 16, 2026 · microsoft internet explorer
A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, the attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft browsers, and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding specially crafted content that could exploit the vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically via an enticement in email or instant message, or by getting them to open an email attachment. The security update addresses the vulnerability by modifying how Microsoft browsers handle objects in memory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 11, 2020 · Catalog
Detected
A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with adminis
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 3, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with adminis
Required action
Apply updates per vendor instructions.
CISA due date May 3, 2022
Affected
- cpe microsoft/chakracoreversion unspecified
- cpe microsoft/edgeversion unspecified
- cpe microsoft/internet explorer11
- cpe microsoft/internet explorer9
- vendor Microsoft Edge and Internet Explorerversion unspecified
Sources
- CISA KEVConfirmed exploitationCVE-2020-0878
Microsoft Edge and Internet Explorer contain a memory corruption vulnerability that allows attackers to execute code in the context of the current user.
cisa.gov - CVE.orgVulnerability recordCVE-2020-0878
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2020-0878
30-day exploitation probability 2.7%
first.org - NIST NVDVulnerability recordCVE-2020-0878
A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exp
nvd.nist.gov