odem protocol allows the remote sender of a file to execute arbitrary programs on the client, as implemented in rz in the rzsz module of FreeBSD before 2.1.5, and possibly other programs. NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-1301","sourceIdentifier":"cve@mitre.org","published":"1996-07-16T04:00:00.000","lastModified":"2026-06-16T21:50:08.943","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A design flaw in the Z-Modem protocol allows the remote sender of a file to execute arbitrary programs on the client, as implemented in rz in the rzsz module of FreeBSD before 2.1.5, and possibly other programs."}],"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:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":true,"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:o:freebsd:freebsd:*:*:*:*:*:*:*:*","versionEndIncluding":"2.1.5","matchCriteriaId":"CE5639A0-BF14-47C9-9271-E081FCFCE40A"}]}]}],"references":[{"url":"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-96:17.rzsz.asc","source":"cve@mitre.org","tags":["Patch","Vendor Advisory"]},{"url":"http://ciac.llnl.gov/ciac/bulletins/g-31.shtml","source":"cve@mitre.org","tags":["Patch","Vendor Advisory"]},{"url":"http://www.iss.net/security_center/static/7540.php","source":"cve@mitre.org"},{"url":"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-96:17.rzsz.asc","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]},{"url":"http://ciac.llnl.gov/ciac/bulletins/g-31.shtml","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]},{"url":"http://www.iss.net/security_center/static/7540.php","source":"af854a3a-2127-422b-91ae-364da2661108"}]}},