How severe is CVE-2000-0478?

CVE-2000-0478 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2000-0478 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0478?

CVE-2000-0478 primarily affects Symantec Norton Antivirus. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0478?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2000-0478 published?

CVE-2000-0478 was published on 2000-06-14 and last updated on 2026-06-16.

CVE-2000-0478

CVE-2000-0478 is a medium-severity vulnerability in Symantec Norton Antivirus with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Symantec Norton Antivirus
Published: 2000-06-14
Last modified: 2026-06-16

Description

In some cases, Norton Antivirus for Exchange (NavExchange) enters a "fail-open" state which allows viruses to pass through the server.

Frequently asked questions

What is CVE-2000-0478?: In some cases, Norton Antivirus for Exchange (NavExchange) enters a "fail-open" state which allows viruses to pass through the server.
How severe is CVE-2000-0478?: CVE-2000-0478 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2000-0478 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0478?: CVE-2000-0478 primarily affects Symantec Norton Antivirus. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0478?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0478 published?: CVE-2000-0478 was published on 2000-06-14 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:symantec:norton_antivirus:1.5:*:ms_exchange:*:*:*:*:*
cpe:2.3:a:symantec:norton_antivirus:2.0:*:ms_exchange:*:*:*:*:*

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