CVE-2025-30397 Overview
Access of resource using incompatible type ('type confusion') in Microsoft Scripting Engine allows an unauthorized attacker to execute code over a network.
Critical Impact
This vulnerability could allow a remote attacker to execute arbitrary code with user privileges in the context of the current user.
Affected Products
- Microsoft Windows 10 1507
- Microsoft Windows 10 1607
- Microsoft Windows 10 1809
Discovery Timeline
- 2025-05-13 - CVE CVE-2025-30397 published to NVD
- 2025-10-27 - Last updated in NVD database
Technical Details for CVE-2025-30397
Vulnerability Analysis
The vulnerability arises from type confusion in the Microsoft Scripting Engine, which may lead to arbitrary code execution and compromise the security of affected systems.
Root Cause
Type confusion occurs when the code accesses resources using an incompatible type, allowing attackers to manipulate situations to achieve unauthorized actions such as code execution.
Attack Vector
This vulnerability can be exploited remotely over a network, requiring user interaction to trigger the vulnerability, such as opening a specially crafted file or visiting a malicious webpage.
// Example exploitation code (sanitized)
function exploit() {
var payload = "maliciousScript";
var target = getTargetEngine();
target.execute(payload);
}
Detection Methods for CVE-2025-30397
Indicators of Compromise
- Unusual processes spawning from scripting engines
- Execution of unsigned scripts
- Network connections to suspicious domains
Detection Strategies
Monitor for anomalous script executions and inspect execution patterns in script engines for indicators of type confusion exploits.
Monitoring Recommendations
Leverage endpoint detection solutions like SentinelOne to observe and block potentially malicious script activities and unauthorized access to scripting engines.
How to Mitigate CVE-2025-30397
Immediate Actions Required
- Ensure systems are updated with the latest security patches from Microsoft.
- Restrict script execution permissions where possible.
- Educate users about the risks of opening untrusted files or clicking unknown links.
Patch Information
Microsoft has released security updates addressing this vulnerability. Refer to the Microsoft Advisory for detailed patching information.
Workarounds
Disable features in scripting engines that are not required by legitimate applications to reduce the attack surface.
# Configuration example
Set-MpPreference -DisableScriptScanning $true
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
