What’s Vulnerable › Vulnerabilities

CVE-2021-43404

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-05 · updated 2026-06-17

Description

An issue was discovered in FusionPBX before 4.5.30. The FAX file name may have risky characters.

Affected products

• fusionpbx: before 4.5.30 — fixed in 4.5.30

How to fix

Upgrade to a fixed version: fusionpbx 4.5.30. Check the vendor advisory for mitigations.

References

• https://github.com/fusionpbx/fusionpbx/commit/487afc371e5c0dfbbc07cd002333c5bcd949d0f4
• https://github.com/fusionpbx/fusionpbx/commit/487afc371e5c0dfbbc07cd002333c5bcd949d0f4

Get alerted when CVE-2021-43404 or the next vulnerability affects your stack