Security readout for executives and security teams
Plain-English summary
Brother BRAdmin Professional 3.75 has a Windows service configuration flaw that can let a local low-privileged user gain SYSTEM-level control. This is most urgent on shared workstations, jump boxes, or print-management servers. Sources do not show remote exploitation or confirmed active exploitation.
Executive priority
Treat as a high-priority endpoint and server hygiene issue, not an internet-facing emergency. Prioritize shared administrative systems, print-management hosts, and environments where standard users access machines running BRAdmin Professional.
Technical view
CVE-2021-47869 is a CWE-428 unquoted service path issue in the BRA_Scheduler service. Windows may resolve an unintended executable path when the service starts, allowing local arbitrary code execution with high privileges. The listed affected version is Brother BRAdmin Professional 3.75.0000.
Likely exposure
Exposure is limited to Windows systems with Brother BRAdmin Professional 3.75.0000 installed, especially where non-admin users can log in locally or write to relevant Brother installation directories.
Exploitation context
The source bundle includes a public Exploit-DB reference and third-party technical writeups. CISA KEV status is false, and no cited source confirms active exploitation in the wild.
Researcher notes
Evidence supports local privilege escalation via unquoted service path in BRA_Scheduler. Patch status is not clear from the provided sources. Avoid assuming broader Brother product impact beyond BRAdmin Professional 3.75.0000.
Mitigation direction
- Inventory systems for Brother BRAdmin Professional 3.75.0000.
- Check Brother support channels for updated software or official remediation guidance.
- Remove BRAdmin Professional where it is not operationally required.
- Restrict local logon rights on systems running the affected software.
- Review and harden write permissions on Brother installation directories.
- Monitor for unexpected executables in Brother application paths.
Validation and detection
- Confirm whether BRAdmin Professional 3.75.0000 is installed.
- Inspect the BRA_Scheduler service path for unquoted spaces.
- Verify non-admin users cannot write to Brother application directories.
- Review service-start events and file creation activity in Brother paths.
- Check vulnerability management tools for CVE-2021-47869 coverage.
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-428: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution 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 lookupCVE-2021-47869 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
- 8.5 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49671CVE reference · exploit
- Brother Global HomepageCVE reference · product
- Brother Software Download PageCVE reference · product
- Vulnerability Technical DetailsCVE reference · technical-description
- VulnCheck Advisory: BRAdmin Professional 3.75 - 'BRA_Scheduler' Unquoted Service PathCVE reference · third-party-advisory
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.
Unquoted Search Path or Element
Unquoted Search Path or Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.