{"id":"CVE-2021-47740","aliases":["EUVD-2025-206077","GHSA-x9rg-7xj6-v2x6"],"status":"published","title":"KZTech JT3500V 4G LTE CPE 2.0.1 Insufficient Session Expiration Vulnerability","description":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers to reuse old session credentials without proper expiration. Attackers can exploit the weak session handling to maintain unauthorized access and potentially compromise device authentication mechanisms.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00424,"percentile":0.36984,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-613"],"published":"2025-12-31T18:40:53Z","modified":"2026-06-17T04:18:23Z","products":[{"vendor":"kz broadband technologies, ltd.","product":"am3000m"},{"vendor":"kz broadband technologies, ltd.","product":"am3100e"},{"vendor":"kz broadband technologies, ltd.","product":"am3100v"},{"vendor":"kz broadband technologies, ltd.","product":"am3300v"},{"vendor":"kz broadband technologies, ltd.","product":"am3410v"},{"vendor":"kz broadband technologies, ltd.","product":"am3500mw"},{"vendor":"kz broadband technologies, ltd.","product":"am4100v"},{"vendor":"kz broadband technologies, ltd.","product":"am4200m"},{"vendor":"kz broadband technologies, ltd.","product":"am5000w"},{"vendor":"kz broadband technologies, ltd.","product":"am6000n"},{"vendor":"kz broadband technologies, ltd.","product":"am6200m"},{"vendor":"kz broadband technologies, ltd.","product":"jt3500v"},{"vendor":"kz broadband technologies, ltd.","product":"kz3120r"},{"vendor":"kz broadband technologies, ltd.","product":"kz3220m"},{"vendor":"kz broadband technologies, ltd.","product":"kz7621u"}],"references":[{"url":"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5646.php","tags":["third-party-advisory"]},{"url":"https://packetstormsecurity.com/files/161892/","tags":["exploit"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/198471","tags":["vdb-entry"]},{"url":"http://www.kzbtech.com/","tags":["product"]},{"url":"https://www.jatontech.com/","tags":["product"]},{"url":"https://neotel.mk/","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/kztech-jtv-g-lte-cpe-insufficient-session-expiration-vulnerability","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47740"},{"url":"https://neotel.mk"},{"url":"https://packetstormsecurity.com/files/161892"},{"url":"https://www.jatontech.com"},{"url":"http://www.kzbtech.com"},{"url":"https://github.com/advisories/GHSA-x9rg-7xj6-v2x6"}],"sources":{"cve":[{"id":"CVE-2021-47740","title":"KZTech JT3500V 4G LTE CPE 2.0.1 Insufficient Session Expiration Vulnerability","description":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers to reuse old session credentials without proper expiration. Attackers can exploit the weak session handling to maintain unauthorized access and potentially compromise device authentication mechanisms.","status":"published","published":"2025-12-31T18:40:53.59Z","modified":"2026-01-02T20:42:41.864Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-613"],"updated_at":"2026-11-02T14:32:56.308189Z"}],"euvd":[{"id":"EUVD-2025-206077","description":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers to reuse old session credentials without proper expiration. Attackers can exploit the weak session handling to maintain unauthorized access and potentially compromise device authentication mechanisms.","status":"published","published":"2025-12-31T18:40:53Z","modified":"2026-01-02T20:42:41Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:48:56.284833Z"}],"ghsa":[{"id":"GHSA-x9rg-7xj6-v2x6","title":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers...","description":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers to reuse old session credentials without proper expiration. Attackers can exploit the weak session handling to maintain unauthorized access and potentially compromise device authentication mechanisms.","status":"published","published":"2025-12-31T21:30:57Z","modified":"2025-12-31T21:31:04Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/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":"medium"}],"cwes":["CWE-613"],"updated_at":"2026-11-02T15:05:25.370391Z"}],"nvd":[{"id":"CVE-2021-47740","description":"KZTech JT3500V 4G LTE CPE 2.0.1 contains a session management vulnerability that allows attackers to reuse old session credentials without proper expiration. Attackers can exploit the weak session handling to maintain unauthorized access and potentially compromise device authentication mechanisms.","status":"published","published":"2025-12-31T19:15:42.103Z","modified":"2026-06-17T04:18:23.93Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/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":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-613"],"updated_at":"2026-11-02T14:07:09.005706Z"}]}}