Security readout for executives and security teams
Plain-English summary
Bosch Smart Home Controllers before 9.8.907 may mishandle permissions during third-party app pairing. A restricted app that is already paired could receive broader default app permissions. Exploitation is not described as remote unauthenticated; the source says app pairing requires user interaction.
Executive priority
Treat this as a moderate-priority remediation item, especially where SHC devices influence security, access, or safety-adjacent automation. The issue needs authorized pairing first, but the impact is permission expansion inside a trusted smart-home control environment.
Technical view
CVE-2019-11896 is a CWE-284 incorrect privilege assignment issue in the SHC third-party pairing mechanism. Bosch Smart Home Controller versions before 9.8.907 are affected. CVSS 3.0 is 5.5, with adjacent attack vector, low complexity, low privileges, and limited confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where Bosch Smart Home Controller devices run firmware before 9.8.907 and third-party apps are paired or can be paired by users. The provided sources do not identify other Bosch products, CPEs, or specific deployment types.
Exploitation context
The source bundle does not show known active exploitation, and the CVE is not in KEV. An adversary would need a successfully paired app; the description says pairing requires user interaction. Public exploit details are not provided in the supplied sources.
Researcher notes
Evidence is limited to the CVE record and Bosch advisory reference. The affected product is Bosch Smart Home Controller before 9.8.907. Do not generalize this to other Bosch ecosystems without vendor confirmation. Validate by firmware and pairing state rather than network scanning alone.
Mitigation direction
- Update Bosch Smart Home Controller firmware to 9.8.907 or later where applicable.
- Review Bosch PSIRT advisory guidance before changing production controller configurations.
- Restrict who can approve or perform third-party app pairing.
- Remove paired third-party apps that are no longer required.
- Monitor Bosch channels for any later guidance or affected-version clarification.
Validation and detection
- Inventory Bosch Smart Home Controller devices and record firmware versions.
- Confirm whether any controller is below firmware 9.8.907.
- Review configured third-party pairings for unexpected or unnecessary apps.
- Check operational logs or admin records for recent pairing activity.
- Document compensating controls if an immediate firmware update is not possible.
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.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-11896 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L2.13.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.5MediumVector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://psirt.bosch.com/Advisory/BOSCH-SA-662084.htmlCVE reference · x_refsource_CONFIRM
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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.