CVE-2000-0991

High CVSS 7.5

Published 2000-12-19 · last changed 2026-09-23

The fix

We hold no Microsoft remediation data for CVE-2000-0991, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-2000-0991

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