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Case File

CVE-2021-39509

CRITICAL · CVSS 9.8 EPSS 5.10% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-24 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-39509
Severity
CRITICAL
CVSS
9.8
EPSS
5.10%

Original NVD Description

An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.

Related CVEs

Other vulnerabilities affecting the same vendor(s)