CVE-2000-0991

Hilgraeve, Inc. HyperTerminal < - RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2000-0991. PoCs published by Ussr Labs.

AI-analyzed exploit summary The exploit describes a buffer overflow vulnerability in Hilgraeve HyperTerminal when processing telnet addresses over 153 characters. This can lead to a denial of service or arbitrary code execution if exploited via a malicious HTML page or email.

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.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Ussr Labs · textdoswindows
https://www.exploit-db.com/exploits/20307

The exploit describes a buffer overflow vulnerability in Hilgraeve HyperTerminal when processing telnet addresses over 153 characters. This can lead to a denial of service or arbitrary code execution if exploited via a malicious HTML page or email.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Theoretical
Target: Hilgraeve HyperTerminal (Windows 98, ME, NT 4.0, 2000)
No auth needed
Prerequisites: Victim interaction (e.g., clicking a malicious link)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/1815
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/5387

Scores

EPSS 0.0969
EPSS Percentile 94.9%

Details

Status published
Products (1)
hilgraeve/hyperterminal < 6.0
Published Dec 19, 2000
Tracked Since Feb 18, 2026