CVE-2021-47740 MEDIUM

CVE-2021-47740: KZTech JT3500V 4G LTE CPE 2.0.1 Insufficient Session Expiration Vulnerability

Vendor Kz Broadband Technologies, Ltd.
Product JT3500V
Weakness CWE-613 · Insufficient session expiration
Published December 31, 2025
Last update January 2, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 31, 2025 CVE published
January 2, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2026-1163 Insufficient Session Expiration in parisneo/lollms CVE-2024-25619 Destroying OAuth Applications doesn't notify Streaming of Access Tokens being destroyed in mastodon CVE-2025-14810 IBM InfoSphere Information Server is vulnerable due to insufficient session expiration CVE-2026-48726 Apache Airflow: revoke_token() unreachable in FabAuthManager / KeycloakAuthManager logout path CVE-2026-32132 ZITADEL: Reactivation of Expired Passkey Registration Codes