CVE•Published 2021-12-16•Modified 2026-07-09•1 article on news•6 live references•NVD data
CVE-2021-42912Fiberhome · An5506-01-a_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
96
Exploit Prediction Scoring System · top 4% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2021-12-16
Modified 2026-07-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-42912Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"An5506-01-a Firmware"Hosts Shodan identified as running An5506-01-a Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2021-42912Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-42912Censys host search filtered to this CVE id.
grep.app
CVE-2021-42912Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-42912GitHub code search for direct mentions.
Google dork
"CVE-2021-42912" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-42912 on GitHub.