How severe is CVE-1999-1262?

CVE-1999-1262 has a CVSS 2.0 base score of 5.1, rated medium severity.

Is CVE-1999-1262 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1262?

CVE-1999-1262 primarily affects Netscape Communicator. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1262?

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

When was CVE-1999-1262 published?

CVE-1999-1262 was published on 1997-08-01 and last updated on 2026-06-16.

CVE-1999-1262

CVE-1999-1262 is a medium-severity vulnerability in Netscape Communicator with a CVSS 2.0 base score of 5.1. 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 5.1)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Communicator
Published: 1997-08-01
Last modified: 2026-06-16

Description

Java in Netscape 4.5 does not properly restrict applets from connecting to other hosts besides the one from which the applet was loaded, which violates the Java security model and could allow remote attackers to conduct unauthorized activities.

Frequently asked questions

What is CVE-1999-1262?: Java in Netscape 4.5 does not properly restrict applets from connecting to other hosts besides the one from which the applet was loaded, which violates the Java security model and could allow remote attackers to conduct unauthorized activities.
How severe is CVE-1999-1262?: CVE-1999-1262 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-1999-1262 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1262?: CVE-1999-1262 primarily affects Netscape Communicator. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1262?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1262 published?: CVE-1999-1262 was published on 1997-08-01 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:netscape:communicator:4.01:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.5:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.06:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.07:*:*:*:*:*:*:*
cpe:2.3:a:netscape:communicator:4.08:*:*:*:*:*:*:*

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