{"id":"CVE-2026-40857","aliases":["EUVD-2026-80672","GHSA-6v9q-56wf-hqwp"],"status":"published","title":"CSRF token bypass in T-Mobile 5G Box IDU routers","description":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412","severity":{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00197,"percentile":0.09468,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-352"],"published":"2026-09-16T11:21:14Z","modified":"2026-09-28T23:10:00Z","products":[{"vendor":"wnc","product":"t-mobile 5g box idu"}],"references":[{"url":"https://cert.pl/posts/2026/09/CVE-2026-40854","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40857"},{"url":"https://github.com/advisories/GHSA-6v9q-56wf-hqwp"}],"sources":{"cve":[{"id":"CVE-2026-40857","title":"CSRF token bypass in T-Mobile 5G Box IDU routers","description":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412","status":"published","published":"2026-09-16T11:21:14.484Z","modified":"2026-09-16T16:00:47.111Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-80672","description":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412","status":"published","published":"2026-09-16T11:21:14Z","modified":"2026-09-16T16:00:47Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:28:15.407859Z"}],"ghsa":[{"id":"GHSA-6v9q-56wf-hqwp","title":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the...","description":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412","status":"published","published":"2026-09-16T12:30:46Z","modified":"2026-09-16T12:30:47Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:11:58.348846Z"}],"nvd":[{"id":"CVE-2026-40857","description":"WNC T-Mobile 5G Box IDU router contains a cross-site request forgery (CSRF) vulnerability in the portal.cgi component. The anti-CSRF mechanism fails to validate the csrf_token_value parameter, accepting any arbitrary value as valid. This allows a remote attacker to perform unauthorized actions on the device by tricking an authenticated user into visiting a malicious website.This issue has been fixed in firmware version 1.1.0.651412","status":"published","published":"2026-09-16T12:17:03.91Z","modified":"2026-09-28T23:10:00.143Z","cvss":[{"version":"4.0","score":8.4,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:12:48.630594Z"}]}}