Vulnerability Intelligence Report
Arm Trusted Firmware Out-of-Bounds Write Vulnerability
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
5.5
MEDIUM
Exploitability:1.9
Impact Score:3.6
EPSS Probability:3.09%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-787 ↗CWE-787 Out-of-bounds Write
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| trustedfirmware | trusted_firmware-m | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2021-02-22T00:00:00 |
| Published | 2021-05-25T18:27:20 |
| Last Updated | 2025-10-21T23:25:45 |
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