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Vulnerability record · CVE-2002-0438 · published 26 July 2002

CVE-2002-0438: Zyxel zywall10 vulnerability

Zyxel · Zywall10

ZyXEL ZyWALL 10 before 3.50 allows remote attackers to cause a denial of service via an ARP packet with the firewall's IP address and an incorrect MAC address, which causes the firewall to disable the LAN interface.

5.0 CVSS 2.0 Medium EPSS 1.8% · top 22.9%
5.0CVSS 2.0 base score
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

ZyXEL ZyWALL 10 before 3.50 allows remote attackers to cause a denial of service via an ARP packet with the firewall's IP address and an incorrect MAC address, which causes the firewall to disable the LAN interface.

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

Affected products

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

References

LinkTags
ftp://ftp.zyxel.com/public/zywall10/firmware/zywall10_V3.50%28WA.2%29C0_Standard.zip
http://archives.neohapsis.com/archives/vulnwatch/2002-q1/0067.html
http://www.iss.net/security_center/static/8436.php Vendor Advisory
http://www.securityfocus.com/archive/1/261411 Vendor Advisory
http://www.securityfocus.com/bid/4272 ExploitPatchVendor Advisory
ftp://ftp.zyxel.com/public/zywall10/firmware/zywall10_V3.50%28WA.2%29C0_Standard.zip
http://archives.neohapsis.com/archives/vulnwatch/2002-q1/0067.html
http://www.iss.net/security_center/static/8436.php Vendor Advisory
http://www.securityfocus.com/archive/1/261411 Vendor Advisory
http://www.securityfocus.com/bid/4272 ExploitPatchVendor Advisory

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Related vulnerabilities

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

4.3CVE-2004-1789Zyxel zywall10 vulnerabilityCross-site scripting (XSS) vulnerability in the web management interface in ZyWALL 10 4.07 allows remote attackers to inject arbitrary web script or …EPSS 11%

Source: NIST National Vulnerability Database (record CVE-2002-0438), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.