CVE-2025-30397highunder attackCWE-843

CVE-2025-30397: high-severity vulnerability in Microsoft Windows 10 Version 1507

Scripting Engine Memory Corruption Vulnerability

Published 13 May 2025 · Updated 26 Feb 2026

78Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 7.5epss 27%

from disclosure to weapon18 days

Published on NVDMay 13

1st PoC+18d

CISA KEVMay 13

exploitation probability

27%top 2% of all CVEs

observed exploitation

yesCISA + VulnCheck

3 public exploit(s)

Action required by CISAfederal deadline: 2025-06-03

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

In short

A flaw in Microsoft's Scripting Engine allows attackers to confuse data types in memory, leading to unauthorized code execution on a computer. This can happen remotely over the internet without special permissions.

Technical detail

Type confusion vulnerability in Microsoft Scripting Engine enables memory corruption via incompatible resource access. Remote attacker can exploit this over the network to achieve arbitrary code execution; no user interaction or elevated privileges required.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Access of resource using incompatible type ('type confusion') in Microsoft Scripting Engine allows an unauthorized attacker to execute code over a network.

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

Affected products

public PoCs found — 3

exploitdbwww.exploit-db.com/exploits/52315unverified githubgithub.com/mbanyamer/CVE-2025-30397---Windows-Server-2025-JScript-RCE-Use-After-Free-★ 66 vulncheckvulncheck.com/xdb/2b537fb7d9daunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

Related CVEs — Microsoft Windows 10 Version 1507

In the same product, most dangerous first.

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30397 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-30397 https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-detection-script https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-mitigation-script