CISA KEV · Known exploitedHigh

CVE-2025-30397

Microsoft Windows

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

CVSS
7.5
EPSS
21.3%
97.4% percentile
CISA KEV
Listed
Published
2025.05.14
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability21.3%
Technical severityCVSS 7.5

Vulnerability overview

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

Affected product and versions

Product
Microsoft Windows
Affected versions
10.0.10240.0, 10.0.14393.0, 10.0.17763.0, 10.0.19044.0, 10.0.19045.0, 10.0.22621.0, 10.0.22631.0, 10.0.26100.0, 6.1.7601.0, 6.0.6003.0, 6.2.9200.0, 6.3.9600.0, 10.0.20348.0, 10.0.25398.0, < 10.0.10240.21014, < 10.0.14393.8066, < 10.0.17763.7314, < 10.0.19044.5854, < 10.0.19045.5854, < 10.0.22621.5335
Fixed versions
10.0.10240.21014, 10.0.14393.8066, 10.0.17763.7314, 10.0.19044.5854, 10.0.19045.5854, 10.0.22621.5335, 10.0.22631.5335, 10.0.26100.3981, 10.0.20348.3692, 10.0.25398.1611

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

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

Due date: 2025.06.03
  1. 1
    Identify

    Confirm that Microsoft Windows and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-843
KEV added
2025.05.13
Ransomware use
미확인
CVE-2025-30397 — Microsoft Windows | SECUFOCUS NOW