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TI-2022-10174 Aliases CVE-2022-26943GHSA-cj2w-wj5h-c44x

Weak PRNG entropy source used for authentication challenge generation in Motorola MTM5000

Priority MEDIUM 40CWE-338Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The Motorola MTM5000 series firmwares generate TETRA authentication challenges using a PRNG using a tick count register as its sole entropy source. Low boottime entropy and limited re-seeding of the pool renders the authentication challenge vulnerable to two attacks. First, due to the limited boottime pool entropy, an adversary can derive the contents of the entropy pool by an exhaustive search of possible values, based on an observed authentication challenge. Second, an adversary can use knowledge of the entropy pool to predict authentication challenges. As such, the unit is vulnerable to CVE-2022-24400.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00357 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MotorolaMobile RadioMTM5000—No fix listedCNA
  • Mobile Radio VendorMotorola Affected MTM5000 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:motorola:mtm5500_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableMotorola
cpe:2.3:h:motorola:mtm5500:-:*:*:*:*:*:*:*not specified by NVDRunning onMotorola
cpe:2.3:o:motorola:mtm5400_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableMotorola
cpe:2.3:h:motorola:mtm5400:-:*:*:*:*:*:*:*not specified by NVDRunning onMotorola
  • cpe:2.3:o:motorola:mtm5500_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Motorola
  • cpe:2.3:h:motorola:mtm5500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Motorola
  • cpe:2.3:o:motorola:mtm5400_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Motorola
  • cpe:2.3:h:motorola:mtm5400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Motorola

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-26943
  2. 2026-10-03 Alias added: GHSA-cj2w-wj5h-c44x

References

Other 1

  • TI-2022-10172 Format string vulnerability in AT+CTGL command in Motorola MTM5000 CVSS 3.1CRITICAL 9.6
  • TI-2022-10173 Multiple missing pointer validation checks in trusted execution module in Motorola MTM5000 CVSS 3.1HIGH 8.2
  • TI-2022-10696 Unconfigured memory protection modules in Motorola MTM5000 CVSS 3.1HIGH 8.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences