Security readout for executives and security teams
Plain-English summary
CVE-2019-11891 affects Bosch Smart Home Controller app pairing. If an attacker has physical access to the controller during the attack, the pairing process may let them gain privileges they choose. That could compromise confidentiality, integrity, and availability of the smart home environment.
Executive priority
Treat as high priority for sites using Bosch Smart Home Controller, especially where physical access is hard to control. The attack prerequisites reduce broad internet-scale urgency, but successful exploitation could affect sensitive smart home control functions.
Technical view
The flaw is an incorrect privilege assignment issue in the Bosch Smart Home Controller pairing mechanism before 9.8.905. The CVSS 3.0 score is 8.0 with high impact to confidentiality, integrity, and availability. The source indicates no prior privileges are needed, but user interaction and physical access are required.
Likely exposure
Exposure is limited to environments using Bosch Smart Home Controller units running firmware before 9.8.905. Practical risk is highest where controllers are physically accessible to visitors, contractors, tenants, or insiders during pairing-related activity.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires physical access to the SHC during the attack, and the CVSS vector includes user interaction.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, and Bosch advisory reference. Do not assume remote exploitation, broad product impact, or active exploitation from the provided data. Focus validation on firmware version, pairing controls, and physical access exposure.
Mitigation direction
- Inventory Bosch Smart Home Controller deployments and firmware versions.
- Prioritize any controller running firmware before 9.8.905.
- Follow Bosch PSIRT advisory BOSCH-SA-662084 for remediation guidance.
- Restrict physical access to controllers and pairing workflows.
- Review paired apps and users for unexpected privileged access.
Validation and detection
- Confirm whether any Bosch SHC is below version 9.8.905.
- Verify controller physical access controls and pairing procedures.
- Check current paired apps/users for unauthorized or excessive privileges.
- Confirm remediation status against Bosch advisory BOSCH-SA-662084.
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
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2019-11891 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
- High
- CVSS
- 8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:N/UI:R/S:U/C:H/I:H/A:H2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
Incorrect Privilege Assignment
Incorrect Privilege Assignment represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.