Security readout for executives and security teams
A very old (year 2000) flaw in Norton Antivirus for Exchange caused the scanner to sometimes "fail open," meaning email carrying viruses could pass through the server unchecked. In practice, this product and the Exchange versions it protected are long obsolete, so the business risk today is minimal unless a legacy system is still running it. Exposure is limited to organizations still running Norton Antivirus for Exchange (NavExchange) on legacy Microsoft Exchange servers from the year 2000 era. This product line and its host platform are long out of support, so real-world exposure today is negligible outside of forgotten or archived systems. Legacy issue with no modern impact if NavExchange is no longer deployed. Priority is low unless a museum-era Exchange server still runs this product. Mitigation focus: Retire any remaining NavExchange installations and migrate to a currently supported mail security gateway.; Confirm modern Exchange or Microsoft 365 tenants use a supported anti-malware engine with monitored fail state behavior.; Consult Symantec/Broadcom legacy advisories for any documented patch or workaround for NavExchange..
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-2000-0478 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
- antivirus-nav-fail-open(4709)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.