Security readout for executives and security teams
Plain-English summary
CVE-2025-30397 is a Microsoft Scripting Engine memory corruption flaw. An attacker could get code execution over a network, but the CVSS vector shows user interaction and high attack complexity. Because CISA lists it in KEV, treat it as actively exploited and prioritize patching affected Windows systems.
Executive priority
High priority. The vulnerability has official Microsoft remediation and CISA KEV status, meaning exploitation is known. Patch affected Windows systems promptly, with executive tracking for legacy assets, delayed maintenance windows, and business units unable to meet KEV-driven remediation timelines.
Technical view
The issue is CWE-843 type confusion in Microsoft Scripting Engine, rated CVSS 7.5. Affected products include listed Windows 10, Windows 11, and Windows Server versions. The vendor reference is tagged as a patch source. Evidence supports remote code execution potential, with user interaction required and official remediation available.
Likely exposure
Exposure is concentrated on affected Windows client and server versions that have not received the Microsoft update for CVE-2025-30397. The bundle lists broad Windows coverage, including Windows 10, Windows 11, and multiple Windows Server releases, including Server Core variants.
Exploitation context
CISA KEV status supports known exploitation. The bundle does not provide exploit volume, attacker identity, exploited delivery chain, or public exploit details. The CVSS vector indicates network attack surface, no privileges required, high complexity, and required user interaction.
Researcher notes
Focus validation on patch presence and affected Windows build coverage. The available bundle supports type confusion, RCE impact, user interaction, high complexity, official fix availability, and KEV exploitation status. It does not provide safe evidence for exploit mechanics, indicators of compromise, or alternate mitigations.
Mitigation direction
- Apply the Microsoft security update for CVE-2025-30397 across affected Windows systems.
- Prioritize KEV remediation for exposed user endpoints and critical Windows servers.
- Check Microsoft guidance for any product-specific prerequisites or servicing requirements.
- Track exceptions where legacy Windows versions cannot be patched immediately.
- Do not rely on unverified third-party scripts without internal review and testing.
Validation and detection
- Inventory Windows versions against the affected product list in the source bundle.
- Confirm installed Microsoft updates address CVE-2025-30397 on sampled systems.
- Check vulnerability scanner results for remaining CVE-2025-30397 findings.
- Review CISA KEV tracking to confirm organizational remediation ownership.
- Validate any temporary controls against Microsoft guidance before accepting risk.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-843: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-30397 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- Yes
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- Scripting Engine Memory Corruption VulnerabilityCVE reference · vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-30397CVE reference · government-resource
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-mitigation-scriptCVE reference
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-detection-scriptCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Access of Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.