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Vulnerability record · CVE-2000-0783 · published 20 October 2000

CVE-2000-0783: Watchguard firebox vulnerability

Watchguard · Firebox

Watchguard Firebox II allows remote attackers to cause a denial of service by sending a malformed URL to the authentication service on port 4100.

5.0 CVSS 2.0 Medium EPSS 1.8% · top 22.7%
5.0CVSS 2.0 base score
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

Watchguard Firebox II allows remote attackers to cause a denial of service by sending a malformed URL to the authentication service on port 4100.

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
http://archives.neohapsis.com/archives/bugtraq/2000-08/0162.html PatchVendor Advisory
http://www.securityfocus.com/bid/1573 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/5098
http://archives.neohapsis.com/archives/bugtraq/2000-08/0162.html PatchVendor Advisory
http://www.securityfocus.com/bid/1573 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/5098

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Related vulnerabilities

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

10.0CVE-2002-1519Rapidstream vulnerabilityFormat string vulnerability in the CLI interface for WatchGuard Firebox Vclass 3.2 and earlier, and RSSA Appliance 3.0.2, allows remote attackers to …EPSS 4.3%10.0CVE-2002-1520Rapidstream vulnerabilityThe CLI interface for WatchGuard Firebox Vclass 3.2 and earlier, and RSSA Appliance 3.0.2, does not properly close the SSH connection when a -N optio…EPSS 2.8%5.0CVE-2002-1046Watchguard firebox vulnerabilityDynamic VPN Configuration Protocol service (DVCP) in Watchguard Firebox firmware 5.x.x allows remote attackers to cause a denial of service (crash) v…EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2000-0783), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.