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Vulnerability record · CVE-2021-42912 · published 16 December 2021

CVE-2021-42912: Fiberhome an5506-01-a firmware os command injection vulnerability

Fiberhome · An5506 01 A Firmware

FiberHome ONU GPON AN5506-04-F RP2617 is affected by an OS command injection vulnerability. This vulnerability allows the attacker, once logged in, to send commands to the operating system as the root user via the ping diagnostic tool, bypassing the IP address field, and concatenating OS commands with a semicolon.

8.8 CVSS 3.1 High EPSS 10% · top 4.5% CWE-78 · OS command injection
8.8CVSS 3.1 base score, v2 9.0
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
2References
9 Jul 2026Last modified by NVD

Description

FiberHome ONU GPON AN5506-04-F RP2617 is affected by an OS command injection vulnerability. This vulnerability allows the attacker, once logged in, to send commands to the operating system as the root user via the ping diagnostic tool, bypassing the IP address field, and concatenating OS commands with a semicolon.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://medium.com/@windsormoreira/fiberhome-an5506-os-command-injection-cve-2021-42912-10b64fd10ce2
https://medium.com/%40windsormoreira/fiberhome-an5506-os-command-injection-cve-2021-42912-10b64fd10ce2

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-42912), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.