THREATPORT/VULNERABILITY/CVE-2020-12834
CRITICAL SEVERITY

CVE-2020-12834

Homematic Ccu2 Firmware vulnerability

CVSS
9.8
EPSS
11.1%
EPSS pct
95th
Exploited
No known
eQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow Remote Code Execution in the JSON API Method ReGa.runScript, by unauthenticated attackers with access to the web interface, due to the default auto-login feature being enabled during first-time setup (or factory reset).
Affected vendor
Eq 3
Affected product
Homematic Ccu2 Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-276 — Incorrect Default Permissions
Published
2020-05-15

Risk analysis

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

Its EPSS score of 11.1% 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-2020-12834

  • Confirm whether Eq 3 Homematic Ccu2 Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2020-12834.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-12834

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-12834 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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