Security readout for executives and security teams
Plain-English summary
A flaw in Windows’ MSHTML platform can mislead users about displayed content and expose confidential information after user interaction. Although its CVSS score is 6.5, CISA lists it as known exploited, increasing real-world urgency for affected Windows desktops and servers.
Executive priority
Treat this as a high-priority patching issue because exploitation is documented through CISA KEV. Expedite remediation across affected Windows estates, focusing first on exposed systems and user endpoints, while tracking exceptions to closure.
Technical view
CVE-2024-43573 is a remotely reachable MSHTML spoofing vulnerability classified as CWE-79. It requires no privileges but does require user interaction. The supplied CVSS 3.1 vector indicates low attack complexity, high confidentiality impact, and no stated integrity or availability impact.
Likely exposure
Exposure includes the listed Windows 10, Windows 11, and Windows Server releases where the applicable Microsoft security update is absent. Actual exposure depends on deployed versions, patch status, and whether users or applications process attacker-controlled content through MSHTML.
Exploitation context
Active exploitation is supported by the supplied CISA KEV status. The bundle does not describe observed campaigns, exploitation volume, attack delivery methods, or attribution, so those details remain unverified.
Researcher notes
The source bundle establishes affected releases, CVSS 6.5, CWE-79 classification, user-interaction requirements, confidentiality impact, a Microsoft patch reference, and KEV status. It does not provide technical root cause, indicators of compromise, exploitation telemetry, or precise fixed build numbers.
Mitigation direction
- Apply the applicable Microsoft security update identified in the MSRC advisory.
- Prioritize affected internet-facing systems and user workstations handling untrusted content.
- Follow current Microsoft guidance for unsupported or extended-support Windows releases.
- Reduce user interaction with unsolicited links and untrusted content until patching is complete.
Validation and detection
- Inventory deployed Windows versions against the affected-product list.
- Verify installation of the applicable Microsoft update using approved patch-management records.
- Confirm vulnerable systems were restarted if required by Microsoft guidance.
- Re-scan affected endpoints and investigate any patch failures or unsupported releases.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2024-43573 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
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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.
CISA KEV status
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:H/I:N/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:H/I:N/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.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2024-43573 added to CISA KEV
- 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
- 2024-10-08T00:00:00.000Z: CVE-2024-43573 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- Windows MSHTML Platform Spoofing VulnerabilityCVE reference, microsoft · vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43573CVE reference, CISA-ADP · government-resource
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.