Security readout for executives and security teams
Plain-English summary
Some eQ-3 HomeMatic control units could let an attacker become administrator after obtaining a session ID through an invalid RemoteApi login attempt. For organizations using these devices, the concern is unauthorized control of connected home or building automation functions.
Executive priority
Treat as high priority if HomeMatic CCU devices are used in operational environments. The issue can lead to administrator access, but the provided sources do not document active exploitation.
Technical view
CVE-2019-10119 affects HomeMatic CCU2 before 2.41.8 and CCU3 before 3.43.16. The devices use session IDs for authentication but lack authorization checks, allowing a session ID from an invalid RemoteApi login attempt to result in admin access.
Likely exposure
Exposure is limited to eQ-3 HomeMatic CCU2 and CCU3 deployments running the affected firmware versions. Risk is higher where the management interface or RemoteApi account is reachable from untrusted networks.
Exploitation context
The source bundle describes an authentication and authorization failure leading to admin login. It does not show CISA KEV listing or provide evidence of active exploitation, public exploit use, or exploitation scale.
Researcher notes
Evidence is concise and lacks CVSS, CWE, and detailed vendor advisory text in the bundle. Focus analysis on version exposure, authorization failure, RemoteApi reachability, and administrative-session behavior without assuming broader product impact.
Mitigation direction
- Update CCU2 firmware to 2.41.8 or later, per affected-version data.
- Update CCU3 firmware to 3.43.16 or later, per affected-version data.
- Review eQ-3 changelogs and vendor guidance before rollout.
- Restrict device management access to trusted networks only.
- Audit RemoteApi account exposure and administrative access paths.
Validation and detection
- Inventory HomeMatic CCU2 and CCU3 devices and record firmware versions.
- Confirm no CCU2 device runs firmware earlier than 2.41.8.
- Confirm no CCU3 device runs firmware earlier than 3.43.16.
- Verify management interfaces are not exposed to untrusted networks.
- Review logs for unexpected administrative sessions or RemoteApi activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-10119 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.eq-3.de/Downloads/Software/HM-CCU2-Firmware_Updates/HM-CCU-2.41.9/HM-CCU2-Changelog.2.41.9.pdfCVE reference · x_refsource_MISC
- https://www.eq-3.de/Downloads/Software/CCU3-Firmware/CCU3-3.43.16/CCU3-Changelog.3.43.16.pdfCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.