CVE-2021-27562 KEV
5.5
MEDIUM · CVSS 3.1 · EPSS 3.1% (pctl 87)
Patch first
On CISA KEV — known exploited in the wild, due 2021-11-17.
Description
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.
Scoring
| CVSS | 5.5 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 3.09% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | yes — remediate by 2021-11-17 |
| Public exploit | none known |
| Published | 2021-05-25 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Arm Trusted Firmware Out-of-Bounds Write Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2021-11-17 |
| Vendor / product | Arm / Trusted Firmware |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| trustedfirmware | trusted firmware-m |
References
- https://developer.arm.com/support/arm-security-updates
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst
- https://developer.arm.com/support/arm-security-updates
- https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27562
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