CVE-2021-27171

CRITICAL 9.8CVE-2021-27171 · Published 10/02/2021 · updated 17/06/2026

In short

CVE-2021-27171 is a CRITICAL (CVSS 9.8) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 17.8%, higher than 97.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Description

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to start a Linux telnetd as root on port 26/tcp by using the CLI interface commands of ddd and shell (or tshell).

References

pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html · Exploit

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