an gain root privileges via SMTP by specifying an improper \ NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-0203","sourceIdentifier":"cve@mitre.org","published":"1995-08-17T04:00:00.000","lastModified":"2026-06-16T21:47:54.237","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In Sendmail, attackers can gain root privileges via SMTP by specifying an improper \"mail from\" address and an invalid \"rcpt to\" address that would cause the mail to bounce to a program."}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"metrics":{"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C","baseScore":10.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":10.0,"acInsufInfo":false,"obtainAllPrivilege":true,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-Other"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:eric_allman:sendmail:8.6.10:*:*:*:*:*:*:*","matchCriteriaId":"C39E29CD-70F7-4C96-93DD-18BD4C6DDFA4"}]}]}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0203","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0203","source":"af854a3a-2127-422b-91ae-364da2661108"}]}},