CVE-2026-57985 in Edge
Summary
by MITRE • 07/04/2026
Improper input validation in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
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Analysis
by VulDB Data Team • 07/04/2026
Microsoft Edge chromium based browser contains a vulnerability related to improper input validation that creates a potential pathway for remote code execution attacks. This flaw exists within the browser's handling of user-supplied data and could be exploited by malicious actors to gain unauthorized control over affected systems. The vulnerability stems from insufficient validation mechanisms that fail to properly sanitize or verify input received from network sources, allowing crafted malicious content to bypass security checks. According to CWE classification, this represents a weakness in input validation where the application does not adequately validate or sanitize data before processing it, creating opportunities for attackers to inject harmful code sequences. The attack surface is particularly concerning as it enables remote exploitation without requiring user interaction beyond visiting a malicious website or receiving crafted network content. This vulnerability aligns with ATT&CK technique T1203 which describes exploiting software vulnerabilities to gain access to systems, and specifically relates to the execution of arbitrary code through browser-based attacks. The operational impact extends beyond simple code execution as attackers could leverage this weakness to establish persistent access, escalate privileges, or deploy additional malicious payloads. Organizations running Microsoft Edge browsers are at risk of compromise when the browser processes untrusted input from web pages, network streams, or other external sources without proper validation controls. The vulnerability's remote exploitability means that adversaries can target users from anywhere on the internet without requiring physical access to the affected systems.
The technical nature of this flaw indicates that Microsoft Edge's chromium implementation fails to properly validate data structures when parsing content received over network connections. This could include HTML elements, javascript code, or other web-based input that should be subject to strict validation before being processed by the browser engine. Input validation failures typically occur when applications assume that all incoming data is trustworthy and fail to implement proper sanitization or encoding mechanisms. The vulnerability may manifest in various contexts including but not limited to URL parsing, content rendering, or script execution within the browser environment. Attackers could potentially craft malicious web pages containing specially formatted input that triggers the validation bypass, leading to code execution in the context of the browser process. This represents a critical security gap as modern browsers must assume they will encounter untrusted content from multiple sources and should implement robust validation controls to prevent exploitation.
Mitigation strategies for this vulnerability should include immediate patching of Microsoft Edge installations to the latest security updates provided by Microsoft. Organizations should also consider implementing network-based protections such as web application firewalls that can detect and block malicious input patterns before they reach vulnerable browsers. Browser security configurations should be hardened through the implementation of content security policies, sandboxing mechanisms, and strict input validation controls within the browser environment. Network administrators should monitor for suspicious traffic patterns and implement intrusion detection systems to identify potential exploitation attempts. The vulnerability also highlights the importance of regular security assessments and penetration testing to identify similar input validation weaknesses in other applications and systems. According to industry best practices and security frameworks, organizations must maintain continuous vigilance against such vulnerabilities through automated patch management systems and proactive threat hunting activities. Additionally implementing browser hardening guidelines from organizations like cisa and nist can significantly reduce the attack surface and prevent exploitation of similar input validation flaws across enterprise environments.