cvedb.io
CVE-2021-31251
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2021-06-04T21:15:07.517 · Last modified 2026-06-17T03:51:30.403

Summary

An authentication bypass in telnet server in BF-430 and BF431 232/422 TCP/IP Converter, BF-450M and SEMAC from CHIYU Technology Inc allows obtaining a privileged connection with the target device by supplying a specially malformed request and an attacker may force the remote telnet server to believe that the user has already authenticated.

Affected products

chiyu-tech — bf-430_firmware

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.