CRITICAL

CVE-2021-45461

CVSS v3

9.8

CRITICAL

EPSS Score

21.5 %

exploit probability, as of 2026-10-20

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-45461 yet.

Full record on NVD

Description

FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.

Technical details

Published: 2021-12-22

Frequently asked questions

What is CVE-2021-45461?

Is CVE-2021-45461 actively exploited?

Active exploitation of CVE-2021-45461 has not been confirmed. Its EPSS score was 21.5% on 2026-10-20, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45461?

CVE-2021-45461 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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