THREATPORT/VULNERABILITY/CVE-2018-4020
HIGH SEVERITY

CVE-2018-4020

Pfsense vulnerability

CVSS
7.2
EPSS
48.7%
EPSS pct
99th
Exploited
No known
An exploitable command injection vulnerability exists in the way Netgate pfSense CE 2.4.4-RELEASE processes the parameters of a specific POST request. The attacker can exploit this and gain the ability to execute arbitrary commands on the system. An attacker needs to be able to send authenticated POST requests to the administration web interface. Command injection is possible in the `powerd_ac_mode` POST parameter parameter.
Affected vendor
Netgate
Affected product
Pfsense
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-78 — OS Command Injection
Published
2018-12-03

Risk analysis

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

Its EPSS score of 48.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2018-4020

  • Confirm whether Netgate Pfsense is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-4020.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-4020

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-4020 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-2018-4020?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2018-4020.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH
CVE-2008-1256
P 660hw vulnerability
HIGH
CVE-2008-1262
Wimax Prost vulnerability
HIGH
CVE-2008-1264
Wrt54g vulnerability