Security readout for executives and security teams
This old Internet Explorer 5 flaw could let a remote attacker read files from a victim system through malicious web content. The business risk is confidentiality loss on any remaining IE5-era system, but the provided sources do not show modern active exploitation or a current severity score. Exposure is likely limited to systems still running Internet Explorer 5 and processing untrusted web content. Most modern environments should not be affected unless legacy machines or applications still depend on that browser. Treat this as a legacy exposure cleanup item unless IE5 is still present. If found in production or sensitive environments, prioritize removal because the impact is file disclosure. Mitigation focus: Review Microsoft MS99-042 and Q243638 for vendor remediation guidance.; Retire or replace Internet Explorer 5 where it still exists.; Block IE5 systems from accessing untrusted web content..
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-1999-0877 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
- MS99-042CVE reference · vendor-advisory, x_refsource_MS
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.