THREATPORT/VULNERABILITY/CVE-2021-42912
HIGH SEVERITY

CVE-2021-42912

An5506 01 A Firmware vulnerability

CVSS
8.8
EPSS
10.9%
EPSS pct
95th
Exploited
No known
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.
Affected vendor
Fiberhome
Affected product
An5506 01 A Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-78 — OS Command Injection
Published
2021-12-16

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 10.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2021-42912

  • Confirm whether Fiberhome An5506 01 A Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-42912.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-42912

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-42912 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2021-42912?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2021-42912.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH
CVE-2015-8427
Flash Player vulnerability
HIGH
CVE-2015-8428
Flash Player vulnerability
HIGH
CVE-2015-8429
Flash Player vulnerability