CVE-2021-27562 on CISA KEV

In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an overwrite of secure data, or the printing out of secure data when calling secure functions under the NSPE handler mode.

01What CISA says about this vulnerability

In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an overwrite of secure data, or the printing out of secure data when calling secure functions under the NSPE handler mode.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• developer.arm.com — https://developer.arm.com/support/arm-security-updates
• git.trustedfirmware.org — https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/s…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

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