CVE-2021-27171

Public Exploit

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).

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.10%
Third-Party Advisory github.io
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-privilege-escalation third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-27171?
CVE-2021-27171 has been scored as a critical severity vulnerability.
How to fix CVE-2021-27171?
To fix CVE-2021-27171, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27171 being actively exploited in the wild?
It is possible that CVE-2021-27171 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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