Vulnerability in Zblchina Zbl Epon Onu Broadband Router
CVE-2021-47741
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.
EPSS: 0.002 (16.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Zblchina Zbl Epon Onu Broadband Router — versions 1.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47741?
- CVE-2021-47741 is a high-severity vulnerability in Zblchina Zbl Epon Onu Broadband Router, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2025-12-31.
- How severe is CVE-2021-47741?
- High severity. CVSS v3 base score is 7.5 out of 10.