CVE-2018-0769 in Edge
Summary
by MITRE
Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0777, CVE-2018-0778, and CVE-2018-0781.
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Analysis
by VulDB Data Team • 09/10/2025
The scripting engine memory corruption vulnerability identified as CVE-2018-0769 represents a critical security flaw within Microsoft Edge browser's JavaScript engine implementation. This vulnerability affects multiple Windows 10 versions including the Gold release, 1511, 1607, 1703, and 1709 editions, as well as Windows Server 2016. The flaw stems from improper handling of objects in memory during script execution, creating potential attack vectors that could be exploited by malicious actors to execute arbitrary code with the privileges of the currently logged-in user. The vulnerability specifically targets the JScript and Chakra scripting engines that power Microsoft Edge's web content rendering capabilities.
The technical nature of this memory corruption vulnerability places it squarely within the CWE-125 weakness category, which describes out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. Attackers can leverage this flaw by crafting malicious web content that, when loaded in Microsoft Edge, triggers the corrupted memory handling routine. The vulnerability's exploitation typically involves manipulating JavaScript objects in ways that cause the engine to access memory locations outside the intended boundaries, potentially allowing attackers to overwrite critical memory segments or execute malicious payloads. This type of vulnerability is particularly dangerous because it operates at the scripting engine level, bypassing many traditional security boundaries that separate user-space applications from system-level operations.
The operational impact of CVE-2018-0769 extends beyond simple privilege escalation, as successful exploitation can enable attackers to gain complete control over affected systems. The vulnerability's presence in multiple Windows 10 releases and Windows Server 2016 creates widespread exposure across enterprise environments, particularly since Microsoft Edge serves as the default browser for these platforms. Attackers can utilize this vulnerability in phishing campaigns, drive-by download scenarios, or by compromising websites that deliver malicious JavaScript payloads. The exploitability of this vulnerability aligns with ATT&CK technique T1059.007 for Windows Command Shell and T1059.001 for Command and Scripting Interpreter, as attackers can execute malicious code directly through the compromised browser environment.
Organizations should prioritize immediate remediation through Microsoft's security updates, as the vulnerability remains active in unpatched systems. The recommended mitigation strategy involves deploying the relevant security patches from Microsoft's monthly security updates, specifically targeting the Chakra scripting engine fixes. Additional protective measures include implementing browser security configurations such as enabling Enhanced Protected Mode in Microsoft Edge, utilizing sandboxing techniques, and maintaining strict network segmentation to limit potential lateral movement. Security teams should also monitor for indicators of compromise related to malicious web content delivery and implement web application firewalls to detect and block suspicious JavaScript execution patterns. The vulnerability's classification as a memory corruption issue makes it particularly susceptible to exploitation through advanced persistent threat campaigns, emphasizing the critical need for rapid patch deployment and comprehensive security monitoring across affected environments.