CVE-2021-27171
CVSS v3
9.8
CRITICAL
EPSS Score
17.8 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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).
Technical details
- Published
- 2021-02-10
Frequently asked questions
What is CVE-2021-27171?
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).
Is CVE-2021-27171 actively exploited?
Active exploitation of CVE-2021-27171 has not been confirmed. Its EPSS score was 17.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-27171?
CVE-2021-27171 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-27171 affecting your environment?
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