Is CVE-2021-42912 actively exploited?

Yes. CVE-2021-42912 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-42912 be exploited remotely?

The attack vector of CVE-2021-42912 has not been classified yet.

What is the CVSS score of CVE-2021-42912?

CVE-2021-42912 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-42912

UNKNOWNCISA KEVIN THE WILD

CVE-2021-42912

Published: April 11, 2026

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.8th

Official 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.

NVD Source

Technical Analysis

CVE-2021-42912 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-42912 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.