CVE-2021-31249
MEDIUM
6.5
CVSS Score
Published: June 4, 2021 at 08:29 PM UTC
Updated: June 17, 2026 at 03:51 AM UTC
6 products affected across 1 vendorBf 431 FirmwareBf 450M FirmwareBf 430 Firmware
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Severity
MEDIUM6.5
Exploit prediction
EPSS 18%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Bf-430· Chiyu Techdevice
80%All versions
Bf-431· Chiyu Techdevice
80%All versions
Bf-450M· Chiyu Techdevice
80%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31249x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/x_refsource_MISCx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.chiyu-tech.com/msg/message-Firmware-update-87.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-74
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