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Vulnerability record · CVE-2000-0380 · published 26 April 2000

CVE-2000-0380: Cisco ios improper input validation vulnerability

Cisco · Ios

The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.

7.1 CVSS 2.0 High EPSS 35% · top 1.6% CWE-20 · Improper input validation
7.1CVSS 2.0 base score
35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

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

References

LinkTags
http://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html
http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml
http://www.osvdb.org/1302
http://www.securityfocus.com/bid/1154
http://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html
http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml
http://www.osvdb.org/1302
http://www.securityfocus.com/bid/1154

Track CVE-2000-0380 inside VULONE

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2000-0380), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.