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CVE Record

CVE-2019-10122: eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa...

eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa ise GmbH HTTP-Server 2.0 component, aka HMCCU-179. This may lead to remote code execution.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2019-10122 affects eQ-3 HomeMatic CCU2 and CCU3 smart-home control units. The vulnerable HTTP server component contains buffer overflows that may allow remote code execution. For executives, the concern is control over automation infrastructure, especially where controllers are reachable beyond trusted networks.

Executive priority

Prioritize remediation where HomeMatic controllers support physical automation, facility operations, or security-adjacent workflows. The lack of active exploitation evidence lowers immediacy, but potential remote code execution on control hardware justifies prompt inventory and firmware validation.

Technical view

The CVE describes buffer overflows in the ReGa ise GmbH HTTP-Server 2.0 component on CCU2 before 2.41.9 and CCU3 before 3.43.16. The stated impact is possible remote code execution. The source bundle does not provide CVSS, CWE, exploit details, or authentication requirements.

Likely exposure

Exposure is limited to organizations or sites using eQ-3 HomeMatic CCU2 or CCU3 controllers below the stated firmware versions. Risk is higher if the controller HTTP service is reachable from untrusted networks.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. Public evidence here supports potential remote code execution, but not observed exploitation, exploit maturity, or required attacker position.

Researcher notes

The available record is sparse: affected versions and RCE potential are stated, but no CVSS vector, CWE, authentication context, exploitability detail, or proof of exploitation is provided. Analysis should stay anchored to firmware version checks and vendor changelog review.

Mitigation direction

  • Upgrade CCU2 devices to firmware 2.41.9 or later.
  • Upgrade CCU3 devices to firmware 3.43.16 or later.
  • Review the eQ-3 changelogs and current vendor guidance before deployment.
  • Prioritize controllers reachable from untrusted or remote networks.

Validation and detection

  • Inventory HomeMatic CCU2 and CCU3 controllers in managed environments.
  • Confirm each CCU2 runs firmware 2.41.9 or later.
  • Confirm each CCU3 runs firmware 3.43.16 or later.
  • Identify whether controller HTTP services are reachable from untrusted networks.
  • Record exceptions where firmware cannot be confirmed or updated.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2019-10122 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.