CVE•Published 2000-12-19•Modified 2026-09-23•1 article on news•5 live references•NVD data
CVE-2000-0991Hilgraeve · Hyperterminal
Vulnerability data via NVD (ingested)
CVSS v3.1
—
EPSS percentile
95
Exploit Prediction Scoring System · top 5% of all CVEs
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.
Timeline
Published 2000-12-19
Modified 2026-09-23
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2000-0991Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Hilgraeve Hyperterminal"All exposed Hilgraeve Hyperterminal instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Hyperterminal"HTTP body or banner mentions "Hyperterminal" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2000-0991Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2000-0991Censys host search filtered to this CVE id.
grep.app
CVE-2000-0991Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2000-0991GitHub code search for direct mentions.
Google dork
"CVE-2000-0991" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2000-0991 on GitHub.