What is CVE-2021-27171?

CVE-2021-27171 is a critical-severity vulnerability in Fiberhome Hg6245d, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-02-10.

How severe is CVE-2021-27171?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Fiberhome Hg6245d

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).

Vulnerability class: Buffer Overflow

EPSS: 0.178 (96.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fiberhome Hg6245d
Fiberhome Hg6245d_firmware
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27171?: CVE-2021-27171 is a critical-severity vulnerability in Fiberhome Hg6245d, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-02-10.
How severe is CVE-2021-27171?: Critical severity. CVSS v3 base score is 9.8 out of 10.