Overview
Arm Trusted Firmware contains an out-of-bounds write vulnerability allowing the non-secure (NS) world to trigger a system halt, overwrite secure data, or print out secure data when calling secure functions under the non-secure processing environment (NSPE) handler mode. This vulnerability affects Yealink Device Management servers.
https://nvd.nist.gov/vuln/detail/CVE-2021-27562
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-27562 |
| Vendor / Product | Arm — Trusted Firmware |
| NVD Published | 2021-05-25 |
| NVD Last Modified | 2025-11-03 |
| CVSS 3.1 Score | 5.5 |
| CVSS 3.1 Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Severity | MEDIUM |
| CWE | CWE-787 |
| CISA KEV Added | 2021-11-03 |
| CISA KEV Deadline | 2021-11-17 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2021-11-17.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2021-11-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2021-11-17 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-27562 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |