{"id":"CVE-2024-39520","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-39520","generatedAt":"2026-10-28T00:20:24.477Z","title":"An Improper Neutralization of Special Elements vulnerability in Juniper Networks Junos OS Evolved commands allows a local, authenticated attacker with low privileges to escalate their privileges to 'root' leading to a full compromise of the system.","description":"An Improper Neutralization of Special Elements vulnerability in Juniper Networks Junos OS Evolved commands allows a local, authenticated attacker with low privileges to escalate their privileges to 'root' leading to a full compromise of the system.\n\nThe Junos OS Evolved CLI doesn't properly handle command options in some cases, allowing users which execute specific CLI commands with a crafted set of parameters to escalate their privileges to root on shell level.\n\nThis issue affects Junos OS Evolved:\n\n  *  All version before 20.4R3-S6-EVO, \n  *  21.2-EVO versions before 21.2R3-S4-EVO,\n  *  21.4-EVO versions before 21.4R3-S6-EVO, \n  *  22.2-EVO versions before 22.2R2-S1-EVO, 22.2R3-EVO, \n  *  22.3-EVO versions before 22.3R2-EVO.","published":"2024-07-11T16:15:03.000Z","lastModified":"2026-06-17T07:42:07.000Z","status":"Modified","sourceIdentifier":"sirt@juniper.net","cvss":{"version":"4.0","score":8.5,"severity":"HIGH","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-78"],"affected":["juniper/junos os evolved"],"epss":{"score":0.0025,"percentile":0.16154,"date":"2026-10-26","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 (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://supportportal.juniper.net/JSA82975","tags":["Vendor Advisory"],"source":"sirt@juniper.net"},{"url":"https://supportportal.juniper.net/JSA82975","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-39520","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."}