CVE-2019-0752 in Internet Explorer
Summary
by MITRE
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-0739, CVE-2019-0753, CVE-2019-0862.
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Analysis
by VulDB Data Team • 11/09/2025
The vulnerability identified as CVE-2019-0752 represents a critical remote code execution flaw within Microsoft Internet Explorer's scripting engine, specifically manifesting as a memory corruption issue that can be exploited by remote attackers. This vulnerability resides in the way the scripting engine manages objects in memory, creating a pathway for malicious actors to execute arbitrary code on affected systems. The flaw affects Internet Explorer versions that utilize the Chakra JavaScript engine, which has been the primary scripting engine for the browser since Internet Explorer 9. The vulnerability is particularly concerning because it allows attackers to bypass security mechanisms and gain unauthorized access to systems running vulnerable versions of Internet Explorer.
The technical exploitation of this vulnerability occurs through memory corruption techniques that leverage the scripting engine's handling of objects in memory. Attackers can craft malicious web content that, when loaded in Internet Explorer, triggers a memory corruption condition that allows arbitrary code execution. The vulnerability is classified under CWE-125 as an out-of-bounds read condition, where the scripting engine fails to properly validate memory access when processing certain JavaScript objects. This particular flaw enables attackers to manipulate memory pointers and execute malicious code with the privileges of the logged-in user. The vulnerability is particularly dangerous because it can be triggered through web-based attacks without requiring user interaction beyond visiting a malicious website, making it a prime target for drive-by download attacks.
From an operational impact perspective, this vulnerability poses significant risks to organizations that still maintain Internet Explorer in their environments, particularly those running older versions of the browser or systems that have not received timely security updates. The remote code execution capability means that attackers can potentially install malware, establish backdoors, or perform lateral movement within networks. The vulnerability affects the Windows operating system platforms where Internet Explorer is installed, with the attack surface extending to any system that uses the affected scripting engine components. Organizations running legacy systems or those that have not migrated away from Internet Explorer remain particularly vulnerable to this type of attack vector, which aligns with tactics described in the MITRE ATT&CK framework under the T1203 technique for legitimate credentials.
Mitigation strategies for CVE-2019-0752 should focus on immediate patch management and browser security hardening measures. Microsoft released security updates that address this vulnerability through the July 2019 security bulletin, and organizations should prioritize applying these patches to all affected systems. Additional protective measures include implementing browser security features such as Enhanced Protected Mode, enabling SmartScreen filter, and utilizing Application Control policies to restrict Internet Explorer usage. Network-based protections such as web application firewalls and content filtering solutions can help reduce the risk of exploitation by blocking access to known malicious domains. Organizations should also consider implementing security awareness training to educate users about the dangers of visiting untrusted websites and downloading content from unknown sources. The vulnerability's classification as a memory corruption issue makes it particularly susceptible to exploit mitigation techniques, and organizations should leverage modern exploit protection features available in current Windows versions to reduce the effectiveness of potential attacks.