CVEvulnerability
CVE-2021-47741
8.7 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-12-31
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-522
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.
Related
Weakness · CWE (1)
- CWE-522 Insufficiently Protected Credentials weakness
References
- http://www.zblchina.com www.zblchina.com
- https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/ web.archive.org
- https://www.exploit-db.com/exploits/49737 www.exploit-db.com
- https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint www.vulncheck.com
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php www.zeroscience.mk