CVE-2021-47740
KZTech JT3500V 4G LTE CPE 2.0.1 Insufficient Session Expiration Vulnerability
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.9EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
31 Dec 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
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
Affected products
KZ Broadband Technologies, Ltd. · AM3000MKZ Broadband Technologies, Ltd. · AM3100EKZ Broadband Technologies, Ltd. · AM3100VKZ Broadband Technologies, Ltd. · AM3300VKZ Broadband Technologies, Ltd. · AM3410VKZ Broadband Technologies, Ltd. · AM3500MWKZ Broadband Technologies, Ltd. · AM4100VKZ Broadband Technologies, Ltd. · AM4200MKZ Broadband Technologies, Ltd. · AM5000WKZ Broadband Technologies, Ltd. · AM6000NKZ Broadband Technologies, Ltd. · AM6200MKZ Broadband Technologies, Ltd. · JT3500VKZ Broadband Technologies, Ltd. · KZ3120RKZ Broadband Technologies, Ltd. · KZ3220MKZ Broadband Technologies, Ltd. · KZ7621UWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://exchange.xforce.ibmcloud.com/vulnerabilities/198471https://neotel.mk/https://packetstormsecurity.com/files/161892/https://www.jatontech.com/https://www.vulncheck.com/advisories/kztech-jtv-g-lte-cpe-insufficient-session-expiration-vulnerabilityhttps://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5646.phphttp://www.kzbtech.com/