CVE-1999-0193

NONECVSS 0.0Weaponized

0.0

Denial of service in Ascend and 3com routers, which can be rebooted by sending a zero length TCP option.

CVSS v3: —
EG Score: —
EPSS: 90.5%
KEV: Not listed

Published

December 1, 1997

Last Modified

April 16, 2026

References (2)

cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0193
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0193

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.

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

(2 references)

Working exploit code is in the public domain (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-20332✓ verified
First seen Mar 17, 1998
Ascend R 4.5 Ci12 - Denial of Service
Open source ↗
Exploit-DBEDB-20331✓ verified
First seen Mar 16, 1998
Ascend R 4.5 Ci12 - Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-1999-0193?

CVE-1999-0193 is a none vulnerability published on December 1, 1997. Denial of service in Ascend and 3com routers, which can be rebooted by sending a zero length TCP option.

When was CVE-1999-0193 disclosed?

CVE-1999-0193 was first published in the National Vulnerability Database on December 1, 1997, 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-1999-0193 actively exploited?

CVE-1999-0193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0193?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0193, 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-1999-0193

📅 Published

🔄 Last Modified

🔗 References (2)