CVE-2000-0991
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS — probability of exploitation (30 days)
9.7%
95.3th percentile
CISA KEV
Not listed
Weakness / dates
—
Published 2000-12-19 · modified 2026-09-23
CVSS breakdown
AV:N/AC:L/Au:N/C:P/I:P/A:P
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Authentication | N | None |
| Confidentiality | P | Partial |
| Integrity | P | Partial |
| Availability | P | Partial |
Timeline
- 2000-12-19 — Published (NVD)
- 2026-09-23 — Last modified (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.
Affected
References
- exploit http://www.securityfocus.com/bid/1815
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5387
- exploit http://www.securityfocus.com/bid/1815
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-079
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5387