CVE-2022-26942: The Motorola MTM5000 series firmwares lack pointer validation on arguments passed to trusted execution environ

Routine

HIGH 8.2MITIGATEMITIGATE

CVE-2022-26942 is a high-severity flaw (CVSS 8.2) affecting mtm5500 firmware, mtm5400 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Motorola MTM5000 series firmwares lack pointer validation on arguments passed to trusted execution environment (TEE) modules. Two modules are used, one responsible for KVL key management and the other for TETRA cryptographic functionality. In both modules, an adversary with non-secure supervisor level code execution can exploit the issue in order to gain secure supervisor code execution within the TEE. This constitutes a full break of the TEE

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.2 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-822, CWE-763
Published	2023-10-19
Last modified	2026-06-17

Publisher (CNA): National Cyber Security Centre Netherlands (NCSC-NL) · Vendor: motorola

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-19 10:15 UTCPublished CVE record published
2026-06-17 04:36 UTCUpdated Record last modified

motorola mtm5500 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

motorola mtm5400 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-26942?

mtm5500 firmware: mitigate or apply the listed mitigation; mtm5400 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-26942 being exploited?

CVE-2022-26942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-26942 affect?

CVE-2022-26942 affects mtm5500 firmware, mtm5400 firmware. Severity is high (CVSS 8.2). The Motorola MTM5000 series firmwares lack pointer validation on arguments passed to trusted execution environment (TEE) modules. Two modules are used, one responsible for KVL key management and the other for TETRA cryptographic functionali

How urgent is CVE-2022-26942?

Priority 31/100. High severity

Related CVEs

CVE-2022-27813 HIGH 8.1 MITIGATE MITIGATE Motorola MTM5000 series firmwares lack properly configured memory protection of pages shared between the OMAP-
CVE-2022-26943 HIGH 8.8 MITIGATE MITIGATE The Motorola MTM5000 series firmwares generate TETRA authentication challenges using a PRNG using a tick count
CVE-2022-26941 CRITICAL 9.6 MITIGATE MITIGATE A format string vulnerability exists in Motorola MTM5000 series firmware AT command handler for the AT+CTGL co

References

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