How severe is CVE-1999-0142?

CVE-1999-0142 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-1999-0142 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0142?

CVE-1999-0142 primarily affects Netscape Navigator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0142?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-1999-0142 published?

CVE-1999-0142 was published on 1996-03-01 and last updated on 2026-06-16.

CVE-1999-0142

CVE-1999-0142 is a high-severity vulnerability in Netscape Navigator with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Navigator
Published: 1996-03-01
Last modified: 2026-06-16

Description

The Java Applet Security Manager implementation in Netscape Navigator 2.0 and Java Developer's Kit 1.0 allows an applet to connect to arbitrary hosts.

Frequently asked questions

What is CVE-1999-0142?: The Java Applet Security Manager implementation in Netscape Navigator 2.0 and Java Developer's Kit 1.0 allows an applet to connect to arbitrary hosts.
How severe is CVE-1999-0142?: CVE-1999-0142 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-0142 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0142?: CVE-1999-0142 primarily affects Netscape Navigator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0142?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-0142 published?: CVE-1999-0142 was published on 1996-03-01 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0142

Affected products (2)

cpe:2.3:a:netscape:navigator:*:*:*:*:*:*:*:*
cpe:2.3:a:sun:java:*:*:*:*:*:*:*:*

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