CVE-2021-42912

Name: CVE-2021-42912
Creator: NVD / NIST
Published: 2021-12-16T17:15:07.98+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 13.80%

Last modified Jun 17, 2026

CVE-2021-42912 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 13.80% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

13.80%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fiberhome	An5506-01-A Firmware	rp0509
Fiberhome	An5506-01-B Firmware	rp2610
Fiberhome	An5506-02-B Firmware	rp2520
Fiberhome	An5506-02-B Firmware	rp2521
Fiberhome	An5506-02-B Firmware	rp2603
Fiberhome	An5506-04-B Firmware	rp2510
Fiberhome	An5506-04-F Firmware	rp2617
Fiberhome	Aan5506-04-G2g Firmware	rp2560

References

http://fiberhome.comBroken Link
http://onu.comNot Applicable
https://medium.com/%40windsormoreira/fiberhome-an5506-os-command-injection-cve-2021-42912-10b64fd10ce2
http://fiberhome.comBroken Link
http://onu.comNot Applicable
https://medium.com/%40windsormoreira/fiberhome-an5506-os-command-injection-cve-2021-42912-10b64fd10ce2

Timeline

Published: Dec 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42912?

How severe is CVE-2021-42912?

CVE-2021-42912 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 13.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42912?

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-2021-42912?

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

Scan your code now

Source: NVD / NIST