{"id":"CVE-1999-1090","title":"The default configuration of NCSA Telnet package for Macintosh and PC enables FTP, even though it does not include an \"ftp=yes\" line, which allows remote attackers to read and modify arbitrary files.","summary":"The default configuration of NCSA Telnet package for Macintosh and PC enables FTP, even though it does not include an \"ftp=yes\" line, which allows remote attackers to read and modify arbitrary files.","severity":"high","cvss":7.5,"cvssVector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","published":"1991-09-10","updated":"2026-06-16","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-1999-1090","references":[{"url":"http://www.cert.org/advisories/CA-1991-15.html","label":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1844","label":"cve@mitre.org"},{"url":"http://www.cert.org/advisories/CA-1991-15.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/1844","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01661,"epssPercentile":0.75244,"ingestedAt":"2026-06-19T03:39:00.689Z","slug":"CVE-1999-1090","body":"## Overview\n\nThe default configuration of NCSA Telnet package for Macintosh and PC enables FTP, even though it does not include an \"ftp=yes\" line, which allows remote attackers to read and modify arbitrary files.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}