Security readout for executives and security teams
Plain-English summary
This flaw can let a malicious file bypass Windows’ Mark of the Web protection, weakening warnings and security checks applied to internet-sourced files. A user must interact with the file. Successful exploitation could allow unauthorized modification, but the supplied evidence does not indicate confidentiality loss, service disruption, or confirmed active exploitation.
Executive priority
Treat this as a moderate patching priority. Accelerate remediation for internet-facing workflows and user endpoints processing untrusted files. The integrity impact is significant, but required user interaction and the absence of supplied active-exploitation evidence reduce immediate emergency urgency.
Technical view
CVE-2024-43487 is a CWE-693 protection-mechanism failure affecting listed Windows 10 and Windows Server releases. Its CVSS 3.1 score is 6.5: network delivery, low complexity, no privileges, and user interaction required. The assessed impact is high integrity loss, with no stated confidentiality or availability impact.
Likely exposure
Exposure is most likely on listed Windows 10 and Windows Server systems missing Microsoft’s applicable security update, particularly endpoints where users receive or open untrusted downloads. The bundle does not provide fixed build numbers or inventory evidence, so organization-specific exposure cannot be confirmed from these sources alone.
Exploitation context
The CVSS vector records functional exploit maturity, but that does not establish observed attacks. The supplied bundle marks the CVE as absent from KEV and provides no cited evidence of active exploitation. Exploitation requires user interaction, making phishing, downloads, and transferred files relevant risk contexts without proving any specific campaign.
Researcher notes
The source bundle identifies a Mark of the Web bypass categorized as CWE-693. CVSS indicates unchanged scope, high integrity impact, and no confidentiality or availability impact. Detailed bypass mechanics, fixed builds, indicators, and affected-component boundaries are not included; researchers should consult Microsoft’s advisory without inferring unsupported exploit behavior.
Mitigation direction
- Apply Microsoft’s security update for CVE-2024-43487 to affected, supported Windows systems.
- Check Microsoft’s advisory for product-specific update and servicing requirements.
- Prioritize user endpoints handling email attachments, downloads, or other untrusted files.
- Maintain attachment filtering and endpoint protections while patch deployment is incomplete.
Validation and detection
- Inventory the listed Windows 10 and Windows Server releases across the environment.
- Verify each affected asset has Microsoft’s applicable CVE-2024-43487 update installed.
- Confirm patch-management reports show successful installation, not merely update approval.
- Review security telemetry for suspicious activity involving internet-sourced files.
- Recheck Microsoft guidance for revised affected-version or update information.
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-693: 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-2024-43487 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/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.
SSVC decision data
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:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C2.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Windows Mark of the Web Security Feature Bypass VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.