How severe is CVE-2000-0517?

CVE-2000-0517 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2000-0517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0517?

CVE-2000-0517 primarily affects Netscape Communicator. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0517?

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

When was CVE-2000-0517 published?

CVE-2000-0517 was published on 2000-05-26 and last updated on 2026-06-16.

CVE-2000-0517

CVE-2000-0517 is a medium-severity vulnerability in Netscape Communicator 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: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Communicator
Published: 2000-05-26
Last modified: 2026-06-16

Description

Netscape 4.73 and earlier does not properly warn users about a potentially invalid certificate if the user has previously accepted the certificate for a different web site, which could allow remote attackers to spoof a legitimate web site by compromising that site's DNS information.

Frequently asked questions

What is CVE-2000-0517?: Netscape 4.73 and earlier does not properly warn users about a potentially invalid certificate if the user has previously accepted the certificate for a different web site, which could allow remote attackers to spoof a legitimate web site by compromising that site's DNS information.
How severe is CVE-2000-0517?: CVE-2000-0517 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2000-0517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0517?: CVE-2000-0517 primarily affects Netscape Communicator. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0517 published?: CVE-2000-0517 was published on 2000-05-26 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:netscape:communicator:4.0:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.5:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.6:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.7:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.51:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.61:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.72:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.73:*:*:*:*:*:*:*

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