TI-2021-08720 Aliases CVE-2021-27173 GHSA-vr73-2fhc-cc9m

An issue was discovered on FiberHome HG6245D devices through RP2613.

MEDIUM 47Published 2021-02-10 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An issue was discovered on FiberHome HG6245D devices through RP2613. There is a telnet?enable=0&key=calculated(BR0_MAC) backdoor API, without authentication, provided by the HTTP server. This will remove firewall rules and allow an attacker to reach the telnet server (used for the CLI).

Why it matters now

EPSS 0.12823 96th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:fiberhome:hg6245d_firmware::::::::	up to rp2613	Vulnerable	FiberHome
cpe:2.3:h:fiberhome:hg6245d:-:::::::*	not specified by NVD	Running on	FiberHome

cpe:2.3:o:fiberhome:hg6245d_firmware:*:*:*:*:*:*:*:* Versions up to rp2613 Vulnerable ·FiberHome
cpe:2.3:h:fiberhome:hg6245d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-27173
2026-10-03 Alias added: GHSA-vr73-2fhc-cc9m

References

Exploit 1

https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#httpd-infoleak

TI-2021-08709 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8
TI-2021-08711 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8
TI-2021-08705 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8
TI-2021-08696 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8
TI-2021-08695 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8
TI-2021-08692 An issue was discovered on FiberHome HG6245D devices through RP2613. CVSS 3.1CRITICAL 9.8

See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences