CVE-2021-47741

ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint

HIGH
7.5
CVSS Score
Published: December 31, 2025 at 06:39 PM UTC
Updated: June 17, 2026 at 04:18 AM UTC
1 product affected across 1 vendorZBL EPON ONU Broadband Router

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Severity
HIGH7.5
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-522

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