CVE-2021-47741

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-522

Affected software

No affected versions have been published.

Timeline

Published: Dec 31, 2025
Last modified: Jun 17, 2026
NVD status: Deferred

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