What is CVE-2021-27139?

CVE-2021-27139 is a high-severity vulnerability in Fiberhome Hg6245d. CVSS score: 7.5/10. Published 2021-02-10.

How severe is CVE-2021-27139?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Fiberhome Hg6245d

CVE-2021-27139

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to extract information from the device without authentication by disabling JavaScript and visiting /info.asp.

Published 2021-02-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.162 (96.8th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.162 · newest: 0.162 · change: 0.000

Affected products

References

pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-27139?: CVE-2021-27139 is a high-severity vulnerability in Fiberhome Hg6245d. CVSS score: 7.5/10. Published 2021-02-10.
How severe is CVE-2021-27139?: High severity. CVSS v3 base score is 7.5 out of 10.