{"id":"CVE-2016-9380","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9380","generatedAt":"2026-10-28T21:51:15.089Z","title":"The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.","description":"The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.","published":"2017-01-23T21:59:03.000Z","lastModified":"2026-06-17T00:55:55.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"},"cwe":["CWE-20"],"affected":["xen/xen","citrix/xenserver"],"epss":{"score":0.0042,"percentile":0.36095,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/94473","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1037347","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://xenbits.xen.org/xsa/advisory-198.html","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://xenbits.xen.org/xsa/xsa198.patch","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201612-56","source":"cve@mitre.org"},{"url":"https://support.citrix.com/article/CTX218775","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/94473","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1037347","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-198.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/xsa198.patch","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201612-56","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.citrix.com/article/CTX218775","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9380","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."}