CVE-2000-0991

NONECVSS 0.0Weaponized

0.0

Buffer overflow in Hilgraeve, Inc. HyperTerminal client on Windows 98, ME, and 2000 allows remote attackers to execute arbitrary commands via a long telnet URL, aka the "HyperTerminal Buffer Overflow" vulnerability.

CVSS v3: —
EG Score: —
EPSS: 92.8%
KEV: Not listed

Published

December 19, 2000

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://www.securityfocus.com/bid/1815
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/5387
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/1815
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/5387

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-20307✓ verified
First seen Oct 18, 2000
Hilgraeve HyperTerminal 6.0 - Telnet Buffer Overflow
Open source ↗

Frequently asked(4)

What is CVE-2000-0991?

CVE-2000-0991 is a none vulnerability published on December 19, 2000. Buffer overflow in Hilgraeve, Inc. HyperTerminal client on Windows 98, ME, and 2000 allows remote attackers to execute arbitrary commands via a long telnet URL, aka the "HyperTerminal Buffer Overflow" vulnerability.

When was CVE-2000-0991 disclosed?

CVE-2000-0991 was first published in the National Vulnerability Database on December 19, 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-2000-0991 actively exploited?

CVE-2000-0991 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2000-0991?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0991, 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-2000-0991

📅 Published

🔄 Last Modified

🔗 References (6)