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Case File

CVE-2021-43405

HIGH · CVSS 8.8 EPSS 35.63% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-05 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 35.6% probability of exploitation in the next 30 days.

Public Exploit Signal

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

GitHub PoC Links
External Security References

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

CVE
CVE-2021-43405
Severity
HIGH
CVSS
8.8
EPSS
35.63%

Original NVD Description

An issue was discovered in FusionPBX before 4.5.30. The fax_extension may have risky characters (it is not constrained to be numeric).

Related CVEs

Other vulnerabilities affecting the same vendor(s)