Is CVE-2021-31250 actively exploited?

Yes. CVE-2021-31250 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-31250 be exploited remotely?

The attack vector of CVE-2021-31250 has not been classified yet.

What is the CVSS score of CVE-2021-31250?

CVE-2021-31250 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-31250

UNKNOWNCISA KEVIN THE WILD

CVE-2021-31250

Published: April 11, 2026

EPSS:82.83%probability of exploitation in 30 daysPercentile:99.2th

Official Description

Multiple storage XSS vulnerabilities were discovered on BF-430, BF-431 and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of sanitization of the input on the components man.cgi, if.cgi, dhcpc.cgi, ppp.cgi.

NVD Source

Technical Analysis

CVE-2021-31250 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-31250 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.