← Back to CVEs

CVE-2021-47741

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published12/31/2025

Last Modified12/31/2025

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-522

References

http://www.zblchina.com(disclosure@vulncheck.com)

https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/49737(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint(disclosure@vulncheck.com)

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.