CVE-2019-14473: eQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization checks

Q: How do I fix CVE-2019-14473?

ccu2 firmware: upgrade to newer than 2.47.15; ccu3 firmware: upgrade to newer than 3.47.15. Exact commands for each OS are on this page.

Q: Is CVE-2019-14473 being exploited?

CVE-2019-14473 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-14473 affect?

CVE-2019-14473 affects ccu2 firmware, ccu3 firmware. Severity is high (CVSS 8.8). eQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization checks. Consequently, a valid guest level or user level account can create a new admin level account, read the service messages, clear the system protoco

Q: How urgent is CVE-2019-14473?

Priority 56/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADEUPGRADE

CVE-2019-14473 is a high-severity flaw (CVSS 8.8) affecting ccu2 firmware, ccu3 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization checks. Consequently, a valid guest level or user level account can create a new admin level account, read the service messages, clear the system protocol or modify/delete internal programs, etc. pp.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-862
Published	2019-08-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: eq-3

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-08-06 19:15 UTCPublished CVE record published
2026-06-17 02:18 UTCUpdated Record last modified

eq-3 ccu2 firmware UPGRADE

Affected: <= 2.47.15

Fixed in: newer than 2.47.15

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

eq-3 ccu3 firmware UPGRADE

Affected: <= 3.47.15

Fixed in: newer than 3.47.15

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-14473?

ccu2 firmware: upgrade to newer than 2.47.15; ccu3 firmware: upgrade to newer than 3.47.15. Exact commands for each OS are on this page.

Is CVE-2019-14473 being exploited?

CVE-2019-14473 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-14473 affect?

CVE-2019-14473 affects ccu2 firmware, ccu3 firmware. Severity is high (CVSS 8.8). eQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization checks. Consequently, a valid guest level or user level account can create a new admin level account, read the service messages, clear the system protoco

How urgent is CVE-2019-14473?

Priority 56/100. High severity; Public exploit reference

Related CVEs

CVE-2019-14475 HIGH 7.5 UPGRADE UPGRADE eQ-3 Homematic CCU2 2.47.15 and prior and CCU3 3.47.15 and prior use session IDs for authentication but lack a
CVE-2019-14424 MEDIUM 6.5 UPGRADE UPGRADE A Local File Inclusion (LFI) issue in the addon CUx-Daemon 1.11a of the eQ-3 Homematic CCU-Firmware 2.35.16 un
CVE-2019-14423 HIGH 8.8 UPGRADE UPGRADE A Remote Code Execution (RCE) issue in the addon CUx-Daemon 1.11a of the eQ-3 Homematic CCU-Firmware 2.35.16 u
CVE-2019-10122 CRITICAL 9.8 UPGRADE UPGRADE eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa is
CVE-2019-10121 CRITICAL 9.8 UPGRADE UPGRADE eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.15 use session IDs for authentication b

References

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