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Vulnerability record · CVE-2000-0991 · published 19 December 2000

CVE-2000-0991: Hilgraeve hyperterminal vulnerability

Hilgraeve · Hyperterminal

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.

7.5 CVSS 2.0 High EPSS 9.7% · top 4.7%
7.5CVSS 2.0 base score
9.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
23 Sep 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/1815 ExploitPatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
https://exchange.xforce.ibmcloud.com/vulnerabilities/5387
http://www.securityfocus.com/bid/1815 ExploitPatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
https://exchange.xforce.ibmcloud.com/vulnerabilities/5387

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Source: NIST National Vulnerability Database (record CVE-2000-0991), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.