How severe is CVE-1999-1226?

CVE-1999-1226 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-1999-1226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1226?

CVE-1999-1226 affects Netscape Communicator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-1226?

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

When was CVE-1999-1226 published?

CVE-1999-1226 was published on 1999-10-28 and last updated on 2026-06-16.

CVE-1999-1226

CVE-1999-1226 is a low-severity vulnerability in Netscape Communicator with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Communicator
Published: 1999-10-28
Last modified: 2026-06-16

Description

Netscape Communicator 4.7 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long certificate key.

Frequently asked questions

What is CVE-1999-1226?: Netscape Communicator 4.7 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long certificate key.
How severe is CVE-1999-1226?: CVE-1999-1226 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-1999-1226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1226?: CVE-1999-1226 affects Netscape Communicator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-1226?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1226 published?: CVE-1999-1226 was published on 1999-10-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:netscape:communicator:*:*:*:*:*:*:*:*

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