High severity7.5NVD Advisory· Published Dec 31, 2025· Updated Apr 15, 2026
CVE-2021-47740
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.
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Affected products
1- Range: 2.0.1
Patches
Vulnerability mechanics
References
7- www.kzbtech.comnvd
- exchange.xforce.ibmcloud.com/vulnerabilities/198471nvd
- neotel.mknvd
- packetstormsecurity.com/files/161892/nvd
- www.jatontech.comnvd
- www.vulncheck.com/advisories/kztech-jtv-g-lte-cpe-insufficient-session-expiration-vulnerabilitynvd
- www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5646.phpnvd
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