How severe is CVE-1999-1004?

CVE-1999-1004 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1004 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1004?

CVE-1999-1004 affects Symantec Norton Antivirus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1004?

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

When was CVE-1999-1004 published?

CVE-1999-1004 was published on 1999-12-16 and last updated on 2026-06-16.

CVE-1999-1004

CVE-1999-1004 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% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Symantec Norton Antivirus
Published: 1999-12-16
Last modified: 2026-06-16

Description

Buffer overflow in the POP server POProxy for the Norton Anti-Virus protection NAV2000 program via a large USER command.

Frequently asked questions

What is CVE-1999-1004?: Buffer overflow in the POP server POProxy for the Norton Anti-Virus protection NAV2000 program via a large USER command.
How severe is CVE-1999-1004?: CVE-1999-1004 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1004 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1004?: CVE-1999-1004 affects Symantec Norton Antivirus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1004?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1004 published?: CVE-1999-1004 was published on 1999-12-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:symantec:norton_antivirus:2000:*:*:*:*:*:*:*

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