Security readout for executives and security teams
Plain-English summary
This flaw affects eQ-3 HomeMatic CCU2 and CCU3 home automation controllers. A session ID could remain usable after logout, allowing automatic login configuration changes despite the user ending the session. The sources do not provide CVSS, confirmed exploitation, or broad impact details.
Executive priority
Treat as a targeted remediation item for environments using HomeMatic CCU controllers. It is not KEV-listed in the supplied data, but stale administrative sessions can weaken control over automation infrastructure.
Technical view
CVE-2019-10120 describes improper session invalidation around the setAutoLogin automatic login configuration. CCU2 firmware before 2.41.8 and CCU3 firmware before 3.43.16 are identified as affected. The issue is tracked as HMCCU-154 in the CVE description.
Likely exposure
Exposure is likely limited to deployed HomeMatic CCU2 or CCU3 controllers running the affected firmware versions, especially where administrative web interfaces are reachable by untrusted users or networks.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The described condition requires continued use of a session ID after logout; the sources do not define attacker prerequisites beyond that.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit status, or detailed advisory text is included in the bundle. Analysis should stay anchored to the CVE description and vendor changelog references, with validation focused on firmware and session behavior.
Mitigation direction
- Inventory HomeMatic CCU2 and CCU3 controllers and record firmware versions.
- Update CCU3 devices to 3.43.16 or later per vendor changelog guidance.
- Update CCU2 devices beyond affected pre-2.41.8 firmware, confirming the vendor-recommended target.
- Restrict controller management interfaces to trusted networks and administrators.
- Review vendor changelogs and advisories for any additional operational mitigations.
Validation and detection
- Confirm no CCU2 device is running firmware earlier than 2.41.8.
- Confirm no CCU3 device is running firmware earlier than 3.43.16.
- Verify logout invalidates administrative sessions in the updated environment.
- Check whether management interfaces are exposed beyond trusted administrative networks.
- Document firmware evidence for vulnerability management closure.
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-2019-10120 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.