CVE-2000-0380

NONECVSS 0.0Weaponized

0.0

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.

CVSS v3: —
EG Score: —
EPSS: 99.4%
KEV: Not listed

Published

April 26, 2000

Last Modified

April 16, 2026

References (8)

cve@mitrehttp://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html
cve@mitrehttp://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml
cve@mitrehttp://www.osvdb.org/1302
cve@mitrehttp://www.securityfocus.com/bid/1154
af854a3a-2127-422b-91ae-364da2661108http://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html
af854a3a-2127-422b-91ae-364da2661108http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/1302
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/1154

Data Freshness Timeline

(refreshed 8× in last 7d / 11× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-19882✓ verified
First seen Apr 26, 2000
Cisco IOS 11.x/12.x - HTTP %%
Open source ↗
Metasploitauxiliary/dos/cisco/ios_http_percentpercent✓ verified
First seen Apr 26, 2000
Cisco IOS HTTP GET /%% Request Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-2000-0380?

CVE-2000-0380 is a none vulnerability published on April 26, 2000. 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.

When was CVE-2000-0380 disclosed?

CVE-2000-0380 was first published in the National Vulnerability Database on April 26, 2000, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2000-0380 actively exploited?

CVE-2000-0380 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2000-0380?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0380, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2000-0380

📅 Published

🔄 Last Modified

🔗 References (8)