CVE-2021-27166

Name: CVE-2021-27166
Creator: NVD / NIST
Published: 2021-02-10T19:15:14.683+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 19.84%

Last modified Jun 17, 2026

CVE-2021-27166 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on FiberHome HG6245D devices through RP2613. The password for the enable command is gpon.. EPSS estimates a 19.84% chance of exploitation in the next 30 days.

Description

An issue was discovered on FiberHome HG6245D devices through RP2613. The password for the enable command is gpon.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

19.84%

97.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Fiberhome	Hg6245d Firmware	<= rp2613

References

https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-linux-hardcoded-credentialsExploit, Third Party Advisory
https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-linux-hardcoded-credentialsExploit, Third Party Advisory

Timeline

Published: Feb 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27166?

An issue was discovered on FiberHome HG6245D devices through RP2613. The password for the enable command is gpon.

How severe is CVE-2021-27166?

CVE-2021-27166 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 19.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27166?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27166?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST