Security readout for executives and security teams
This is an old Internet Explorer ActiveX flaw. If a user browsed malicious content with the vulnerable HHOpen control installed, the browser process could be forced into running attacker-controlled commands. The practical concern is limited to legacy environments that still retain IE 4.01 or 5-era components. Likely exposure is confined to very old Windows and Internet Explorer 4.01 or 5 installations where hhopen.ocx 1.0.0.1 remains registered and usable by browser content. Treat this as a legacy-risk cleanup item unless confirmed present in production. If found on business-critical systems, prioritize migration or isolation because the stated impact is arbitrary command execution. Mitigation focus: Check vendor or archived advisory guidance for any official correction or removal advice.; Retire unsupported Internet Explorer 4.01 or 5 systems where feasible.; Inventory and isolate systems that still require legacy ActiveX controls..
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
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CVE-1999-1577 mapping review
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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
- ie-hhopen-bo(3314)CVE reference · vdb-entry, x_refsource_XF
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.