Security readout for executives and security teams
A very old flaw in Internet Explorer 5's DirectShow filter (MSDXM.OCX) could let a malicious website run commands on a visitor's Windows PC through the vnd.ms.radio protocol. The bug was disclosed in 2000 and affects long-retired software. Modern, patched Windows systems are not exposed, but any surviving legacy IE5 hosts could still be at risk. Exposure today should be effectively nil in supported environments. IE5 and the affected MSDXM.OCX build have been superseded by decades of Windows and browser updates. Residual risk exists only on unpatched legacy hosts (e.g., isolated OT, historical archives, or air-gapped XP-era systems) that still render web content in IE5. Very low. This is a 1999-era Internet Explorer 5 issue with no modern relevance for a patched environment. Treat as informational unless the organization still operates legacy Windows or IE5 systems, in which case fold remediation into ongoing legacy retirement work rather than opening a dedicated response. Mitigation focus: Retire any remaining Internet Explorer 5 installations and migrate to a supported modern browser.; Apply all superseding Microsoft security updates on any legacy Windows hosts still in service.; Confirm the vnd.ms.radio protocol handler is disabled or absent on legacy systems..
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.
CVE-1999-0989 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
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.