What is CVE-2022-31784?

CVE-2022-31784 is a critical-severity vulnerability in Mitel Mivoice Business, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-06-17.

How severe is CVE-2022-31784?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Mitel Mivoice Business

CVE-2022-31784

A vulnerability in the management interface of MiVoice Business through 9.3 PR1 and MiVoice Business Express through 8.0 SP3 PR3 could allow an unauthenticated attacker (that has network access to the management interface) to conduct a buffer overflow attack due to insufficient validation of URL parameters. A successful exploit could allow arbitrary code execution.

Vulnerability class: Buffer Overflow

Published 2022-06-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (76.4th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.mitel.com/support/security-advisories (Vendor Advisory)
www.mitel.com/support/security-advisories/mitel-product-security-advisory-22-00… (Vendor Advisory)

Frequently asked questions

What is CVE-2022-31784?: CVE-2022-31784 is a critical-severity vulnerability in Mitel Mivoice Business, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-06-17.
How severe is CVE-2022-31784?: Critical severity. CVSS v3 base score is 9.8 out of 10.