How severe is CVE-2021-43619?

CVE-2021-43619 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43619 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43619?

CVE-2021-43619 primarily affects Trustedfirmware Trusted Firmware-m. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43619?

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-2021-43619 published?

CVE-2021-43619 was published on 2022-03-01 and last updated on 2026-06-17.

CVE-2021-43619

CVE-2021-43619 is a high-severity vulnerability in Trustedfirmware Trusted Firmware-m with a CVSS 3.x base score of 7.8. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Trustedfirmware Trusted Firmware-m
Published: 2022-03-01
Last modified: 2026-06-17

Description

Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition. In the IPC model, a psa_fwu_write caller from SPE or NSPE can overwrite stack memory locations.

Frequently asked questions

What is CVE-2021-43619?: Trusted Firmware M 1.4.x through 1.4.1 has a buffer overflow issue in the Firmware Update partition. In the IPC model, a psa_fwu_write caller from SPE or NSPE can overwrite stack memory locations.
How severe is CVE-2021-43619?: CVE-2021-43619 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43619 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43619?: CVE-2021-43619 primarily affects Trustedfirmware Trusted Firmware-m. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43619?: 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-2021-43619 published?: CVE-2021-43619 was published on 2022-03-01 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.4.0:*:*:*:*:*:*:*
cpe:2.3:o:trustedfirmware:trusted_firmware-m:1.4.1:*:*:*:*:*:*:*

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