High severity7.5NVD Advisory· Published Feb 10, 2021· Updated Jun 17, 2026
CVE-2021-27173
CVE-2021-27173
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).
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Affected products
2- FiberHome/HG6245Ddescription
Patches
Vulnerability mechanics
References
1- pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.htmlnvdExploitThird Party Advisory
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