CVE-1999-0843

NONECVSS 0.0

0.0

Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.

CVSS v3: —
EG Score: —
EPSS: 66.4%
KEV: Not listed

Published

November 4, 1999

Last Modified

April 16, 2026

References (2)

cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0843
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0843

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

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Frequently asked(4)

What is CVE-1999-0843?

CVE-1999-0843 is a none vulnerability published on November 4, 1999. Denial of service in Cisco routers running NAT via a PORT command from an FTP client to a Telnet port.

When was CVE-1999-0843 disclosed?

CVE-1999-0843 was first published in the National Vulnerability Database on November 4, 1999, 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-1999-0843 actively exploited?

CVE-1999-0843 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0843?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0843, 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-1999-0843

📅 Published

🔄 Last Modified

🔗 References (2)