Actively exploited · Published May 13, 2025 · Assigned by microsoft
CVE-2025-30397Scripting Engine Memory Corruption Vulnerability
High 7.5 Exploited
In plain English
A high-severity type confusion in Windows 10 Version 1507 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on May 13, 2025). The chance it is exploited in the next 30 days is estimated at 27.3% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Jun 3, 2025.
Official description
Access of resource using incompatible type ('type confusion') in Microsoft Scripting Engine allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
Weakness: CWE-843 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
References
- Scripting Engine Memory Corruption Vulnerability vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-30397 government-resource
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-mitigation-script
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-detection-script