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Vulnerability record · CVE-2002-1766 · published 31 December 2002

CVE-2002-1766: Netscape communicator vulnerability

Netscape · Communicator

Buffer overflow in Composer in Netscape 4.77 allows local users to overwrite process memory and execute arbitrary code via a font tag with a long face attribute.

4.6 CVSS 2.0 Medium EPSS 1.0% · top 38.4%
4.6CVSS 2.0 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Buffer overflow in Composer in Netscape 4.77 allows local users to overwrite process memory and execute arbitrary code via a font tag with a long face attribute.

AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://online.securityfocus.com/archive/1/276876
http://www.securityfocus.com/bid/5010 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/9355
http://online.securityfocus.com/archive/1/276876
http://www.securityfocus.com/bid/5010 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/9355

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2002-2248Netscape communicator memory buffer overflow vulnerabilityBuffer overflow in the sun.awt.windows.WDefaultFontCharset Java class implementation in Netscape 4.0 allows remote attackers to execute arbitrary cod…EPSS 5.8%7.5CVE-2002-0593Mozilla vulnerabilityBuffer overflow in Netscape 6 and Mozilla 1.0 RC1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbit…EPSS 3.5%7.5CVE-2001-0596Netscape communicator vulnerabilityNetscape Communicator before 4.77 allows remote attackers to execute arbitrary Javascript via a GIF image whose comment contains the Javascript.EPSS 8.7%7.5CVE-2000-1187Netscape communicator vulnerabilityBuffer overflow in the HTML parser for Netscape 4.75 and earlier allows remote attackers to execute arbitrary commands via a long password value in a…EPSS 2.6%7.5CVE-2000-0711Microsoft virtual machine vulnerabilityNetscape Communicator does not properly prevent a ServerSocket object from being created by untrusted entities, which allows remote attackers to crea…EPSS 34%7.5CVE-1999-1189Netscape communicator vulnerabilityBuffer overflow in Netscape Navigator/Communicator 4.7 for Windows 95 and Windows 98 allows remote attackers to cause a denial of service, and possib…EPSS 2.5%7.5CVE-1999-1357Netscape communicator vulnerabilityNetscape Communicator 4.04 through 4.7 (and possibly other versions) in various UNIX operating systems converts the 0x8b character to a "<" sign, and…EPSS 2.0%7.5CVE-1999-0440Netscape communicator vulnerabilityThe byte code verifier component of the Java Virtual Machine (JVM) allows remote execution through malicious web pages.EPSS 3.6%

Source: NIST National Vulnerability Database (record CVE-2002-1766), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.