CVE-2001-0080

NONECVSS 0.0Weaponized

0.0

Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.

CVSS v3: —
EG Score: —
EPSS: 94.3%
KEV: Not listed

Published

February 12, 2001

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://www.cisco.com/warp/public/707/catalyst-ssh-protocolmismatch-pub.shtml
cve@mitrehttp://www.securityfocus.com/bid/2117
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/5760
af854a3a-2127-422b-91ae-364da2661108http://www.cisco.com/warp/public/707/catalyst-ssh-protocolmismatch-pub.shtml
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/2117
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/5760

Data Freshness Timeline

(refreshed 13× in last 7d / 19× 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.

2026-05-29 13:40 UTCepss_batch
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Publicly available exploits

(1 reference)

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

Exploit-DBEDB-20509✓ verified
First seen Dec 13, 2000
Cisco Catalyst 4000/5000/6000 6.1 - SSH Protocol Mismatch Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-2001-0080?

CVE-2001-0080 is a none vulnerability published on February 12, 2001. Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.

When was CVE-2001-0080 disclosed?

CVE-2001-0080 was first published in the National Vulnerability Database on February 12, 2001, 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-2001-0080 actively exploited?

CVE-2001-0080 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2001-0080?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0080, 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-2001-0080

📅 Published

🔄 Last Modified

🔗 References (6)