{"cve":"CVE-2016-9379","nvd":{"published":"2017-01-23T21:59:02.707","modified":"2026-06-17T00:55:55.187","status":"Modified","description":"The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":7.9},"cwes":["CWE-20"],"references":["http://www.securityfocus.com/bid/94473","http://www.securitytracker.com/id/1037347","http://xenbits.xen.org/xsa/advisory-198.html","http://xenbits.xen.org/xsa/xsa198.patch","https://security.gentoo.org/glsa/201612-56"],"products":["citrix:xenserver","xen:xen"],"source":"nvd","synced_at":"2026-10-19T20:41:25.729257544+00:00"},"epss":{"cve":"CVE-2016-9379","score":0.00437,"percentile":0.37995,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}