{"id":"CVE-2018-18555","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-18555","generatedAt":"2026-10-29T00:37:36.799Z","title":"The user can then run arbitrary operating system commands with the privileges afforded by their account.","description":"A sandbox escape issue was discovered in VyOS 1.1.8. It provides a restricted management shell for operator users to administer the device. By issuing various shell special characters with certain commands, an authenticated operator user can break out of the management shell and gain access to the underlying Linux shell. The user can then run arbitrary operating system commands with the privileges afforded by their account.","published":"2018-12-17T19:29:01.000Z","lastModified":"2026-06-17T01:47:30.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.9,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["vyos/vyos"],"epss":{"score":0.01769,"percentile":0.78007,"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 (1.77%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases","tags":["Exploit","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-18555","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."}