Security readout for executives and security teams
GoodTech Telnet Server for Windows NT can be crashed by a remote user who sends an unusually long login name. This is a denial-of-service issue: the service becomes unavailable until it is restarted. The CVE is from 1999 and targets legacy software that should not remain in production today. Exposure is limited to environments still running GoodTech Telnet Server for Windows NT reachable over the network. Given the software's age and the general decline of telnet in production, real-world exposure in modern estates should be negligible unless legacy or embedded systems remain. Low priority for most organizations. Legacy 1999 denial-of-service issue in obsolete telnet software. Prioritize only if a business unit still operates GoodTech Telnet Server NT, in which case retirement of telnet is the pragmatic action rather than a targeted fix. Mitigation focus: Retire GoodTech Telnet Server NT and migrate remote administration to SSH.; Block inbound TCP/23 from untrusted networks at perimeter and host firewalls.; Restrict telnet access to trusted management VLANs or jump hosts only..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-1999-0991 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
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- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
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Source materials
- CVE List V5 sourceCVE List V5
Products and packages named in the record
CWE details
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