CVE-2025-30397
Published: May 13, 2025
Official Description
Microsoft Windows Scripting Engine contains a type confusion vulnerability that allows an unauthorized attacker to execute code over a network via a specially crafted URL.
CISA KEV Advisory
Microsoft Windows Scripting Engine Type Confusion Vulnerability
Microsoft Windows Scripting Engine contains a type confusion vulnerability that allows an unauthorized attacker to execute code over a network via a specially crafted URL.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This Microsoft Windows Scripting Engine vulnerability is a type confusion flaw that allows an unauthorized attacker to execute code over a network via a specially crafted URL. The high EPSS score indicates a significant likelihood of exploitation, and its presence in the KEV catalog confirms it has been actively exploited, making it an urgent concern for Windows users.
This vulnerability has been actively exploited in the wild. It is remotely exploitable over a network via a specially crafted URL.
Apply the latest security updates from Microsoft for the Windows Scripting Engine. Exercise caution when clicking on untrusted URLs and ensure network perimeter defenses are robust.
Technical Analysis
CVE-2025-30397 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-30397 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-30397 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1