High severity7.5NVD Advisory· Published Dec 31, 2025· Updated Apr 15, 2026
CVE-2021-47741
CVE-2021-47741
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.
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Affected products
1- Range: = V100R001
Patches
Vulnerability mechanics
References
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