What is CVE-2022-24400?

CVE-2022-24400 is a high-severity vulnerability in Etsi Tetra Standard, classified under CWE-807. CVSS score: 7.5/10. Published 2023-10-19.

How severe is CVE-2022-24400?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Etsi Tetra Standard

CVE-2022-24400

A flaw in the TETRA authentication procecure allows a MITM adversary that can predict the MS challenge RAND2 to set session key DCK to zero.

Published 2023-10-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (17.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

tetraburst.com/ (related, Vendor Advisory)

Frequently asked questions

What is CVE-2022-24400?: CVE-2022-24400 is a high-severity vulnerability in Etsi Tetra Standard, classified under CWE-807. CVSS score: 7.5/10. Published 2023-10-19.
How severe is CVE-2022-24400?: High severity. CVSS v3 base score is 7.5 out of 10.