CVE-2020-1569 in Edge
Summary
by MITRE
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory. The vulnerability could corrupt memory in such a way that enables 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, an 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 Edge, and then convince a user to view the website. The attacker could also take advantage of compromised websites and 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 by way of enticement in an email or Instant Messenger message, or by getting them to open an attachment sent through email. The security update addresses the vulnerability by modifying how Microsoft Edge handles objects in memory.
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Analysis
by VulDB Data Team • 02/24/2026
This vulnerability represents a critical remote code execution flaw in Microsoft Edge browsers that stems from improper memory object handling during web page processing. The vulnerability manifests when the browser fails to properly validate memory access patterns while rendering web content, creating conditions where memory corruption can occur. This type of vulnerability falls under the CWE-125 weakness category, which specifically addresses out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. The flaw exists in the browser's rendering engine where it improperly manages object references in memory, potentially allowing attackers to manipulate memory layout through carefully crafted web content.
The operational impact of this vulnerability is severe as it provides attackers with the ability to execute arbitrary code within the context of the current user's privileges. According to the ATT&CK framework, this represents a privilege escalation vector that could be leveraged for initial access and lateral movement within compromised systems. When exploited successfully, the vulnerability allows attackers to gain the same user rights as the current user, meaning that if the user has administrative privileges, the attacker could achieve full system control. This capability enables attackers to install malicious software, modify or delete critical data, and create new user accounts with complete administrative rights, fundamentally compromising system integrity and confidentiality.
The attack vector for this vulnerability primarily involves web-based exploitation through malicious websites or compromised legitimate sites that host malicious content. Attackers can craft specially designed web pages that, when viewed through Microsoft Edge, trigger the memory corruption condition. This approach aligns with the ATT&CK technique T1566, which covers spearphishing and social engineering tactics to deliver malicious payloads. The exploitation requires user interaction through phishing emails, instant messaging, or by tricking users into opening malicious attachments. The attack surface is broad as it affects any user who visits compromised websites or clicks on malicious links, making it particularly dangerous in enterprise environments where users frequently browse the internet.
Microsoft's security update addresses this vulnerability by modifying the memory handling mechanisms within Edge's rendering engine to properly validate object access patterns and prevent memory corruption conditions. The fix implements additional bounds checking and memory validation procedures that prevent the specific memory access patterns that led to the vulnerability. Organizations should prioritize applying this update immediately as the vulnerability has a high severity rating and is actively being exploited in the wild. The mitigation strategy should include comprehensive patch management processes, web filtering solutions, and user education initiatives to reduce the risk of successful exploitation through social engineering tactics. Additionally, implementing network monitoring to detect suspicious web traffic and browser behavior can help identify potential exploitation attempts before they succeed.