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PatchSiren cyber security CVE debrief

CVE-2025-30397 Microsoft CVE debrief

CVE-2025-30397 is a Microsoft Windows Scripting Engine type confusion vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-05-13. Because CISA lists it as known exploited, defenders should treat it as a high-priority remediation item and follow Microsoft’s vendor guidance without delay. The supplied source corpus does not provide exploit mechanics, affected builds, or a CVSS score.

Vendor
Microsoft
Product
Windows
CVSS
HIGH 7.5
CISA KEV
Listed
Original CVE published
2025-05-13
Original CVE updated
2025-05-13
Advisory published
2025-05-13
Advisory updated
2025-05-13

Who should care

Windows administrators, endpoint security teams, SOC analysts, and incident responders responsible for Microsoft Windows systems should prioritize this CVE, especially where patch deployment and exposure reduction are centrally managed.

Technical summary

The vulnerability is identified as a type confusion issue in the Microsoft Windows Scripting Engine. CISA’s KEV entry confirms it as a known exploited vulnerability and records Microsoft Windows as the affected vendor/product pair. Beyond the vulnerability class and KEV status, the supplied sources do not include technical detail about impact scope, affected versions, or exploitation method.

Defensive priority

Urgent. CISA added this CVE to the KEV catalog on 2025-05-13 and set a remediation due date of 2025-06-03, indicating the issue should be prioritized in normal patch and risk-reduction workflows.

Recommended defensive actions

  • Apply Microsoft’s remediation guidance for CVE-2025-30397 as soon as possible.
  • Prioritize affected Windows assets for patch verification and deployment before the CISA due date of 2025-06-03.
  • Use the CISA KEV catalog and Microsoft’s vulnerability guidance to confirm remediation status across managed endpoints and servers.
  • If immediate patching is not possible, apply vendor-recommended mitigations and reduce exposure until remediation is complete.

Evidence notes

This debrief is based only on the supplied CISA KEV record and the linked official vulnerability records. The corpus confirms the CVE ID, vendor/product, vulnerability name, KEV status, date added, due date, and required action language, but it does not supply CVSS data, affected version ranges, exploit details, or impact severity beyond the vulnerability class.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-30397 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-30397

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-30397 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-30397

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.