CVE-2025-21326 in Windows
Summary
by MITRE • 01/14/2025
Internet Explorer Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 02/12/2025
This vulnerability represents a critical remote code execution flaw in Microsoft Internet Explorer that allows attackers to execute arbitrary code on affected systems without user interaction. The vulnerability stems from improper handling of memory objects during web page rendering processes, specifically within the browser's scripting engine which is classified under common weakness enumeration cwe-125 out-of-bounds read vulnerabilities. Attackers can leverage this flaw by hosting malicious content on compromised websites or through social engineering tactics that诱导 users to visit malicious pages. The technical implementation involves memory corruption issues that occur when Internet Explorer processes specially crafted javascript or activeX components, leading to potential privilege escalation and full system compromise.
The operational impact of this vulnerability extends beyond simple remote code execution as it provides attackers with persistent access to target systems and enables advanced persistent threat campaigns. According to attack technique mappings in the mitre att&ck framework, this vulnerability aligns with multiple tactics including initial access through malicious websites, execution via browser exploits, and privilege escalation once a foothold is established. The vulnerability affects multiple versions of internet explorer across different windows operating systems and can be exploited without requiring user interaction, making it particularly dangerous in enterprise environments where users may inadvertently visit compromised sites. Security researchers have identified that the flaw exists in the jscript9 engine's memory management routines which are commonly used for web application scripting.
Mitigation strategies for this vulnerability encompass multiple layers of defense including immediate patch deployment through microsoft security updates, browser hardening measures such as disabling activeX controls and javascript execution in restricted zones, and network-based protections like web application firewalls that can detect and block malicious payloads. Organizations should implement strict internet explorer usage policies and consider migrating to more secure modern browsers that receive regular security updates. The vulnerability also highlights the importance of maintaining up-to-date security patches and conducting regular vulnerability assessments to identify similar memory corruption issues that may exist in other browser components or web application frameworks. Additionally, network segmentation and monitoring solutions should be deployed to detect suspicious network traffic patterns associated with exploitation attempts.