CVE-2021-47740

HIGH

KZTech JT3500V - Privilege Escalation

Title source: llm
STIX 2.1

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.

References (7)

Core 7
Core References
Third Party Advisory third-party-advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5646.php
Exploit, Third Party Advisory exploit
https://packetstormsecurity.com/files/161892/
Third Party Advisory, VDB Entry vdb-entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/198471
Various Sources product
https://www.jatontech.com/
Various Sources product
https://neotel.mk/
Various Sources product
http://www.kzbtech.com/

Scores

CVSS v3 7.5
EPSS 0.0038
EPSS Percentile 29.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-613
Status published
Products (16)
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
... and 6 more
Published Dec 31, 2025
Tracked Since Feb 18, 2026