CVE-2025-30397: Microsoft Windows Scripting Engine Type Confusion Vulnerability

CVE-2025-30397 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2025-05-13

A type confusion vulnerability in the Microsoft Windows Scripting Engine allows an unauthorized attacker to execute arbitrary code over a network. Exploitation typically requires a user to visit a specially crafted URL, leading to the access of resources using incompatible types.

Technologies: Microsoft Windows. Vendors: Microsoft.

Quick answers

Is CVE-2025-30397 exploited in the wild?
Yes. CVE-2025-30397 is known to be exploited in the wild, first recorded on 13 May 2025. Treat it as urgent.
How severe is CVE-2025-30397?
Critical severity, with a CVSS score of 7.5, published 13 May 2025.
Which products and versions are affected?
Microsoft Windows Scripting Engine; Microsoft Windows 10 up to (excluding) 10.0.14393.8066, 10.0.17763.7314, 10.0.19044.5854, 10.0.19045.5854, 10.0.10240.21014; Microsoft Windows 11 up to (excluding) 10.0.22621.5335, 10.0.22631.5335, 10.0.26100.4061; Microsoft Windows Server 2008 / 2012 / 2016 / 2019 / 2022 / 2025.
Is there a fix for CVE-2025-30397?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-30397 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2025-30397?
Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft Windows Scripting Engine
  • Microsoft Windows 10 up to (excluding) 10.0.14393.8066, 10.0.17763.7314, 10.0.19044.5854, 10.0.19045.5854, 10.0.10240.21014
  • Microsoft Windows 11 up to (excluding) 10.0.22621.5335, 10.0.22631.5335, 10.0.26100.4061
  • Microsoft Windows Server 2008 / 2012 / 2016 / 2019 / 2022 / 2025

Timeline

  • 2025-05-13: disclosed
  • 2025-05-13: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2025-05-13: exploited: Reported as exploited in the wild at time of publication.

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.