CVE-2022-24401Public exploit

Traffic decryption via manipulated frame counters

Published Oct 19, 2023 · Updated Aug 3, 2024

Cryptographic nonce reuse in TETRA allows physically proximate attackers to recover keystreams and decrypt air-interface traffic. The Air Interface Encryption generator derives its IV from unauthenticated TDMA frame counters, letting crafted counter broadcasts force reuse of a TEA keystream. An active radio-positioned attacker must manipulate a mobile station's counter view and analyze responses; exposed non-E2EE traffic can then be intercepted or forged.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic nonce reuse in TETRA allows physically proximate attackers to recover keystreams and decrypt air-interface traffic. The Air Interface Encryption generator derives its IV from unauthenticated TDMA frame counters, letting crafted counter broadcasts force reuse of a TEA keystream. An active radio-positioned attacker must manipulate a mobile station's counter view and analyze responses; exposed non-E2EE traffic can then be intercepted or forged.

The record

CVE
CVE-2022-24401
Published
Oct 19, 2023
Updated
Aug 3, 2024
Vendor
European Telecommunications Standards Institute
Product
TETRA
Classifications
CWE-323, CWE-639, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=all

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

European Telecommunications Standards Institute · TETRAversion=all

Published CVSS scores

8.8NCSC-NLCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-323Reusing a Nonce, Key Pair in Encryption
CWE-639Authorization Bypass Through User-Controlled Key
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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