Security readout for executives and security teams
Plain-English summary
Bosch Smart Home Controller firmware before 9.8.905 could allow an unauthorized party to obtain a backup shortly after a legitimate user creates one. The main business risk is exposure of sensitive smart-home configuration data, not system takeover or outage based on the provided CVSS impact.
Executive priority
Treat as a targeted confidentiality risk. Prioritize remediation where controllers protect sensitive homes, offices, or executive residences, or where untrusted users share the same network environment.
Technical view
CVE-2019-11894 is an improper access control issue in the SHC backup mechanism. The CVSS 3.0 vector is AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, indicating adjacent access, no privileges, user interaction, and high confidentiality impact with no stated integrity or availability impact.
Likely exposure
Exposure appears limited to Bosch Smart Home Controller deployments running versions before 9.8.905. The supplied data does not establish internet-wide exposure, affected CPEs, or affected Bosch products beyond Smart Home Controller.
Exploitation context
The source bundle does not cite active exploitation, and KEV is false. Exploitation requires a legitimate user to trigger and complete a backup, with the adversary positioned to access the backup immediately afterward.
Researcher notes
Evidence is narrow but coherent: Bosch SHC before 9.8.905, CWE-284, backup access control failure, confidentiality-only impact. The timing dependency and adjacent-access vector reduce broad exploitation likelihood, but backup contents may be sensitive.
Mitigation direction
- Identify Bosch Smart Home Controller devices in use.
- Confirm firmware is not older than 9.8.905.
- Review Bosch PSIRT advisory guidance before making changes.
- Limit network access to the controller to trusted segments.
- Avoid creating backups on untrusted or shared networks.
Validation and detection
- Inventory SHC firmware versions and flag versions before 9.8.905.
- Confirm backup functionality is restricted to authorized users.
- Review network placement for adjacent-access exposure.
- Check logs or monitoring for unusual backup access if available.
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-2019-11894 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
- Medium
- CVSS
- 5.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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:N/A:N2.13.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.7MediumVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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.