CVE-2019-18939

Hm Print vulnerability

CVSS

9.8

EPSS

40.8%

EPSS pct

99th

Exploited

No known

eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the HM-Print AddOn through 1.2a installed allow Remote Code Execution by unauthenticated attackers with access to the web interface via the exec.cgi and exec1.cgi scripts, which execute TCL script content from an HTTP POST request.

Affected vendor

Hm Print Project

Affected product

Hm Print

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-306 — Missing Authentication for Critical Function

Published

2019-11-14

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 40.8% 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-2019-18939

Confirm whether Hm Print Project Hm Print is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-18939.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-18939

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-18939 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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