Exploitation Summary
CVE-2021-27562 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021.
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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_misc
https://developer.arm.com/support/arm-security-updates
Permissions Required, Third Party Advisory x_refsource_confirm
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27562
Scores
CVSS v3
5.5
EPSS
0.1087
EPSS Percentile
93.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
no
Technical Impact
partial
Details
CISA KEV
2021-11-03
VulnCheck KEV
2021-03-15
InTheWild.io
2021-02-23
ENISA EUVD
EUVD-2021-14313
CWE
CWE-787
Status
published
Products (2)
arm/trusted_firmware-m
< 1.2.0
trustedfirmware/trusted_firmware-m
< 1.2.0
Published
May 25, 2021
KEV Added
Nov 03, 2021
Tracked Since
Feb 18, 2026