Home/CVE/Microsoft Windows Scripting Engine Type Confusion Vulnerability
CVE

CVE-2025-30397

Microsoft Windows Scripting Engine Type Confusion Vulnerability

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

HIGH · CVSS 7.5 ⚠ CISA KEV EPSS 0.20737
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 4% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

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

⬡

Weakness Classification

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
▤

Affected Products & Versions

15
microsoft windows 10 1507< 10.0.10240.21014
microsoft windows 10 1607< 10.0.14393.8066
microsoft windows 10 1809< 10.0.17763.7314
microsoft windows 10 21h2< 10.0.19044.5854
microsoft windows 10 22h2< 10.0.19045.5854
microsoft windows 11 22h2< 10.0.22621.5335
microsoft windows 11 23h2< 10.0.22631.5335
microsoft windows 11 24h2< 10.0.26100.3981
⚠

Public Exploits & PoCs

2
remoteMicrosoft Windows Server 2025 JScript Engine - Remote Code Execution (RCE)2025-06-05
pocwww.vicarius.io · cve-2025-30397-type-confusion-vulnerability-in-microsoft-...www.vicarius.io
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 May 2025 · 05:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
msrcCVE-2025-30397Remote Code Execution
cisaKEV-CVE-2025-30397
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-mitigation-scriptMitigationThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-30397US Government Resource
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