{"id":"CVE-2026-40855","state":"PUBLISHED","title":"Command Injection in T-Mobile 5G Box IDU router via ping functionality","description":"WNC T-Mobile 5G Box IDU router is vulnerable to a command injection. The vulnerability exists in the ping functionality within the /cgi-bin/portal.cgi endpoint, specifically affecting the ping_ip, ping_size, and ping_times POST parameters. The root cause is the failure to verify and sanitize user-supplied input before incorporating it into a system command. This allows an authenticated attacker to execute arbitrary commands on the shell and gain root access to the system.This issue has been fixed in firmware version 1.1.0.651412","publishedAt":"2026-09-16T11:21:11.939Z","updatedAt":"2026-09-16T16:01:54.453Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","source":"CERT-PL"},"assigner":"CERT-PL","products":["WNC T-Mobile 5G Box IDU"],"affected":[{"vendor":"WNC","product":"T-Mobile 5G Box IDU","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.1.0.651412","versionType":"custom"}]}],"references":["https://cert.pl/posts/2026/09/CVE-2026-40854"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/40xxx/CVE-2026-40855.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40855","state":"PUBLISHED","datePublished":"2026-09-16T11:21:11.939Z","dateUpdated":"2026-09-16T16:01:54.453Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-04-15T11:10:34.849Z"},"containers":{"cna":{"title":"Command Injection in T-Mobile 5G Box IDU router via ping functionality","descriptions":[{"lang":"en","value":"WNC T-Mobile 5G Box IDU router is vulnerable to a command injection. The vulnerability exists in the ping functionality within the /cgi-bin/portal.cgi endpoint, specifically affecting the ping_ip, ping_size, and ping_times POST parameters. The root cause is the failure to verify and sanitize user-supplied input before incorporating it into a system command. This allows an authenticated attacker to execute arbitrary commands on the shell and gain root access to the system.This issue has been fixed in firmware version 1.1.0.651412"}],"affected":[{"vendor":"WNC","product":"T-Mobile 5G Box IDU","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.1.0.651412","versionType":"custom"}]}],"references":[{"url":"https://cert.pl/posts/2026/09/CVE-2026-40854","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.3,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-16T11:21:11.939Z"},"impacts":[{"capecId":"CAPEC-88","descriptions":[{"lang":"en","value":"CAPEC-88 OS Command Injection"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:wnc:t-mobile_5g_box_idu:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"1.1.0.651412"}]}]}],"credits":[{"lang":"en","value":"Patryk Bogdan","type":"finder"},{"lang":"en","value":"Adam Borczyk","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T16:01:43.879737Z","id":"CVE-2026-40855","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-16T16:01:54.453Z"}}]}}}