CVEs / CVE-2020-0878
CVE-2020-0878: Microsoft Edge and Internet Explorer Memory Corruption Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- medium 5.1 CVSS 2.0 (NVD)
- EPSS 2.69% chance of exploitation in the next 30 days, higher than 85% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Edge and Internet Explorer contain a memory corruption vulnerability that allows attackers to execute code in the context of the current user.
Description
<p>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.</p> <p>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.</p> <p>The security update addresses the vulnerability by modifying how Microsoft browsers handle objects in memory.</p>
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft ChakraCore | before publication | publication |
| Microsoft Microsoft Edge (EdgeHTML-based) | from 1.0..0, before publication | publication |
| Microsoft Internet Explorer 9 | from 1.0.0, before publication | publication |
| Microsoft Internet Explorer 11 | from 1.0.0, before publication | publication |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 2.0 | 5.1 mediumAV:N/AC:H/Au:N/C:P/I:P/A:PScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2020-0878 on NVD
- CVE-2020-0878 in the CISA KEV catalog
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0878 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0878 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.