CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Microsoft Edge and Internet Explorer Memory Corruption Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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 products
microsoft: internet explorer; microsoft: windows 10 1507; microsoft: windows 10 1607; microsoft: windows 10 1709; microsoft: windows 10 1803; microsoft: windows 10 1809; microsoft: windows 10 1903; microsoft: windows 10 1909; microsoft: windows 10 2004; microsoft: windows 7; microsoft: windows 8.1; microsoft: windows rt 8.1; microsoft: windows server 2008; microsoft: windows server 2012; microsoft: windows server 2016
References3
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-… PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-… PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
4.2
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 3% percentile: 86 · as of 2 November 2026
- CWE
- CWE-787