How severe is CVE-2022-24400?

CVE-2022-24400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-24400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-24400?

CVE-2022-24400 affects Midnightblue Tetra. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-24400?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-24400 published?

CVE-2022-24400 was published on 2023-10-19 and last updated on 2026-06-17.

CVE-2022-24400

CVE-2022-24400 is a high-severity vulnerability in Midnightblue Tetra with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Midnightblue Tetra
Published: 2023-10-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2022-24400?: CVE-2022-24400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-24400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-24400?: CVE-2022-24400 affects Midnightblue Tetra. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-24400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-24400 published?: CVE-2022-24400 was published on 2023-10-19 and last updated on 2026-06-17.

References

https://tetraburst.com/

Affected products (1)

cpe:2.3:a:midnightblue:tetra\:burst:-:*:*:*:*:*:*:*

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