{"id":"CVE-2026-21915","state":"PUBLISHED","title":"JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root","description":"A Permissive List of Allowed Input vulnerability in the CLI of Juniper Networks Support Insights (JSI) Virtual Lightweight Collector (vLWC) allows a local, high privileged attacker to escalate their privileges to root.\n\nThe CLI menu accepts input without carefully validating it, which allows for shell command injection. These shell commands are executed with root permissions and can be used to gain complete control of the system.\n\nThis issue affects all JSI vLWC versions before 3.0.94.","publishedAt":"2026-04-09T21:26:28.357Z","updatedAt":"2026-04-13T13:04:16.101Z","severity":{"score":8.4,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/R:U/RE:M","source":"juniper"},"assigner":"juniper","products":["Juniper Networks JSI LWC"],"affected":[{"vendor":"Juniper Networks","product":"JSI LWC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.94","versionType":"semver"}],"platforms":["vLWC"]}],"references":["https://kb.juniper.net/JSA106016"],"weaknesses":["CWE-183"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/21xxx/CVE-2026-21915.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-21915","state":"PUBLISHED","datePublished":"2026-04-09T21:26:28.357Z","dateUpdated":"2026-04-13T13:04:16.101Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-01-05T17:32:48.711Z"},"containers":{"cna":{"title":"JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root","descriptions":[{"lang":"en","value":"A Permissive List of Allowed Input vulnerability in the CLI of Juniper Networks Support Insights (JSI) Virtual Lightweight Collector (vLWC) allows a local, high privileged attacker to escalate their privileges to root.\n\nThe CLI menu accepts input without carefully validating it, which allows for shell command injection. These shell commands are executed with root permissions and can be used to gain complete control of the system.\n\nThis issue affects all JSI vLWC versions before 3.0.94."}],"affected":[{"vendor":"Juniper Networks","product":"JSI LWC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.94","versionType":"semver"}],"platforms":["vLWC"]}],"references":[{"url":"https://kb.juniper.net/JSA106016","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.7,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"baseSeverity":"HIGH","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/R:U/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-183","description":"CWE-183 Permissive List of Allowed Input","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-04-09T21:26:28.357Z"},"datePublic":"2026-04-08T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue: 3.0.94, and all subsequent releases.\n\n<br>"}],"value":"The following software releases have been updated to resolve this specific issue: 3.0.94, and all subsequent releases."}],"source":{"advisory":"JSA106016","defect":["JDEF-980"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.<br>\n\n<br>"}],"value":"Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-21915","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-04-10T03:56:14.461955Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-13T13:04:16.101Z"}}]}}}