CVE-1999-0991

Exp

Buffer overflow in GoodTech Telnet Server NT allows remote users to cause a denial of service via a long login name.

Published: 1999-12-06 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0991 is rated High Exploit Risk (69.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.40%, 91th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.44% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-1999-0991

EDB-ID Source Kind Published Link
19666 exploit_db edb 1999-12-06 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-1999-0991

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-25 3.96% 6.40% +2.44%
2 2025-03-17 1.21% 3.96% +2.74%
3 2024-02-08 — 1.21% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0991

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-1999-0991

Affected software / configurations for CVE-1999-0991

Vendor Product Version Raw CPE
goodtech telnet_server_nt 2.2.1 cpe:2.3:a:goodtech:telnet_server_nt:2.2.1:*:*:*:*:*:*:*

References for CVE-1999-0991

cvelogic Threat Intelligence