CVE-2021-47741
PUBLISHED 12/31/2025 83251b91-4cc7-4094-a5c7-464a1b83ea10
Technical Description
ZBL EPON ONU Broadband Router V100R001 contains a privilege escalation vulnerability that allows limited administrative users to elevate access by sending requests to configuration endpoints. Attackers can exploit the vulnerability by accessing the configuration backup or password page to disclose the super user password and gain additional privileged functionalities.
Affected Products
Zblchina
ZBL EPON ONU Broadband Router
1.0
References
https://www.exploit-db.com/exploits/49737
ExploitDB-49737
http://www.zblchina.com
ZBL China Vendor Homepage
https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/
Archived W&D Thailand Vendor Homepage
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php
Zero Science Lab Disclosure (ZSL-2021-5647)
https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint
VulnCheck Advisory: ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint
Impact Analysis
Attack Vector Network
Attack Complexity Low
Privileges Required None