CVE-2001-0751

NONECVSS 0.0Weaponized

0.0

Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.

CVSS v3: —
EG Score: —
EPSS: 93.3%
KEV: Not listed

Published

October 18, 2001

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://www.cisco.com/warp/public/707/CBOS-multiple2-pub.html
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/139
af854a3a-2127-422b-91ae-364da2661108http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.html
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/139

Data Freshness Timeline

(refreshed 12× in last 7d / 18× 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
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
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2026-05-27 13:37 UTCepss_batch
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2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
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2026-05-18 21:29 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-19522✓ verified
First seen Sep 27, 1999
Linux Kernel 2.2 - Predictable TCP Initial Sequence Number
Open source ↗

Frequently asked(4)

What is CVE-2001-0751?

CVE-2001-0751 is a none vulnerability published on October 18, 2001. Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.

When was CVE-2001-0751 disclosed?

CVE-2001-0751 was first published in the National Vulnerability Database on October 18, 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-2001-0751 actively exploited?

CVE-2001-0751 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2001-0751?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0751, 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-2001-0751

📅 Published

🔄 Last Modified

🔗 References (4)