What’s Vulnerable › Vulnerabilities
CVE-2021-47740: KZTech JT3500V 4G LTE CPE 2.0.1 Insufficient Session Expiration Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-31 · updated 2026-06-17
- Weakness: CWE-613
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.
Affected products
- KZ Broadband Technologies, Ltd. AM3000M: 2.0.0B21
- KZ Broadband Technologies, Ltd. AM3100E: 2.0.0B981
- KZ Broadband Technologies, Ltd. AM3100V: 2.0.0B946
- KZ Broadband Technologies, Ltd. AM3300V: 2.0.0B1060
- KZ Broadband Technologies, Ltd. AM3410V: 2.0.0B1085
- KZ Broadband Technologies, Ltd. AM3500MW: 2.0.0B1092
- KZ Broadband Technologies, Ltd. AM4100V: 2.0.0B2988
- KZ Broadband Technologies, Ltd. AM4200M: 2.0.0B2996
- KZ Broadband Technologies, Ltd. AM5000W: 2.0.0B3037
- KZ Broadband Technologies, Ltd. AM6000N: 2.0.0B3042
- KZ Broadband Technologies, Ltd. AM6200M: 2.0.0B3210
- KZ Broadband Technologies, Ltd. JT3500V: 2.0.1B1064, 2.0.1B1047
- KZ Broadband Technologies, Ltd. KZ3120R: 2.0.0B01
- KZ Broadband Technologies, Ltd. KZ3220M: 2.0.0B04
- KZ Broadband Technologies, Ltd. KZ7621U: 2.0.0B14
References
- http://www.kzbtech.com/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/198471
- https://neotel.mk/
- https://packetstormsecurity.com/files/161892/
- https://www.jatontech.com/
- https://www.vulncheck.com/advisories/kztech-jtv-g-lte-cpe-insufficient-session-expiration-vulnerability
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5646.php
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