A CRLF injection vulnerability was found on BF-430, BF-431, and BF-450M TCP/IP Converter…
Priority MEDIUM 46CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A CRLF injection vulnerability was found on BF-430, BF-431, and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of validation on the parameter redirect= available on multiple CGI components.
Why it matters now
EPSS 0.18003 97th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:chiyu-tech:bf-430_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Chiyu-tech |
| cpe:2.3:h:chiyu-tech:bf-430:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Chiyu-tech |
| cpe:2.3:o:chiyu-tech:bf-431_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Chiyu-tech |
| cpe:2.3:h:chiyu-tech:bf-431:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Chiyu-tech |
| cpe:2.3:o:chiyu-tech:bf-450m_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Chiyu-tech |
| cpe:2.3:h:chiyu-tech:bf-450m:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Chiyu-tech |
- cpe:2.3:o:chiyu-tech:bf-430_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Chiyu-tech
- cpe:2.3:h:chiyu-tech:bf-430:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Chiyu-tech
- cpe:2.3:o:chiyu-tech:bf-431_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Chiyu-tech
- cpe:2.3:h:chiyu-tech:bf-431:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Chiyu-tech
- cpe:2.3:o:chiyu-tech:bf-450m_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Chiyu-tech
- cpe:2.3:h:chiyu-tech:bf-450m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Chiyu-tech
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31249
- 2026-10-03 Alias added: GHSA-7ccm-338c-fv4r
References
More Chiyu-tech Bf-430 Firmware vulnerabilities
- TI-2021-11450 An authentication bypass in telnet server in BF-430 and BF431 232/422 TCP/IP Converter… CVSS 3.1CRITICAL 9.8
- TI-2021-11449 Multiple storage XSS vulnerabilities were discovered on BF-430, BF-431 and BF-450M TCP/IP… CVSS 3.1MEDIUM 5.4
- TI-2021-11451 An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W… CVSS 3.1MEDIUM 6.1
- TI-2021-11724 An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology… CVSS 3.1MEDIUM 6.1
Sources
- CVE-2021-31249 · CVE Program
- CVE-2021-31249 · NVD
- FIRST EPSS
- GHSA-7ccm-338c-fv4r · GitHub Advisory Database · CC BY 4.0
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