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CVE-2025-30397

Microsoft Windows Scripting Engine Type Confusion

7.5 HIGHActively exploited (CISA KEV)Public exploitEPSS 26.8%
  1. Published13 May 2025
  2. Added to CISA KEV13 May 2025
  3. Remediation due3 Jun 2025
Actively exploited (CISA KEV)

Microsoft Windows Scripting Engine contains a type confusion vulnerability that allows an unauthorized attacker to execute code over a network via a specially crafted URL.

Added to KEV: 13 May 2025Federal remediation due: 3 Jun 2025

Description

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 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

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
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.8066
Microsoft Windows Server 2019< 10.0.17763.7314
Microsoft Windows Server 2022< 10.0.20348.3692
Microsoft Windows Server 2022 23h2< 10.0.25398.1611
Microsoft Windows Server 2025< 10.0.26100.3981

Remediation

Fixed in
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
Microsoft Windows Server 2016≥ 10.0.14393.8066
Microsoft Windows Server 2019≥ 10.0.17763.7314

References

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Frequently asked

Is CVE-2025-30397 being actively exploited?

Yes. CVE-2025-30397 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 13 May 2025.

How severe is CVE-2025-30397?

CVE-2025-30397 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 26.8% probability of exploitation.

Which products are affected by CVE-2025-30397?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, and 10 more.

How do I fix CVE-2025-30397?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.21014, Microsoft Windows 10 1607 10.0.14393.8066, Microsoft Windows 10 1809 10.0.17763.7314 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-30397 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.