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CVE-2021-27173

HIGH
7.5
CVSS Score
Published: February 10, 2021 at 06:35 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
2 products affected across 1 vendorHG6245D FirmwareHG6245D

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Severity
HIGH7.5
Exploit prediction
EPSS 13%

Description

An issue was discovered on FiberHome HG6245D devices through RP2613. There is a telnet?enable=0&key=calculated(BR0_MAC) backdoor API, without authentication, provided by the HTTP server. This will remove firewall rules and allow an attacker to reach the telnet server (used for the CLI).

Affected

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

HG6245D Firmware· Fiberhome
95%
v ≤ rp2613
fiberhome-hg6245d (same device)
HG6245D· Fiberhomedevice
80%
All versions

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.

References (1)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#httpd-infoleak

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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