{"id":"CVE-1999-1127","url":"https://www.cyber-defence.io/tools/cve/CVE-1999-1127","generatedAt":"2026-10-27T19:39:07.845Z","title":"Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which allows remote attackers to cause a denial of service (resource exhaustion) via a series of connections containing malformed data, aka the \"Named Pipes Over RPC\"…","description":"Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which allows remote attackers to cause a denial of service (resource exhaustion) via a series of connections containing malformed data, aka the \"Named Pipes Over RPC\" vulnerability.","published":"1999-12-31T05:00:00.000Z","lastModified":"2026-06-16T21:49:47.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-772"],"affected":["microsoft/windows nt"],"epss":{"score":0.17745,"percentile":0.97141,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 17.7%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://support.microsoft.com/support/kb/articles/Q195/7/33.asp","tags":["Broken Link","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.iss.net/security_center/static/523.php","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-017","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://support.microsoft.com/support/kb/articles/Q195/7/33.asp","tags":["Broken Link","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.iss.net/security_center/static/523.php","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-017","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-1999-1127","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}