# CVE-2021-27562

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-27562
- CVSS: 5.5
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 3.06% (percentile 87.8)
- CISA SSVC: exploitation active, automatable no, technical impact partial (assessed 2025-02-04)
- Weakness: CWE-787
- Published: 2021-05-25

## Affected

- trustedfirmware:trusted_firmware-m

## References

- [other] https://developer.arm.com/support/arm-security-updates
- [other] https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27562

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.