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CVE-2021-27562: Arm Trusted Firmware Out-of-Bounds Write Vulnerability
Arm Trusted Firmware · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
3.09%EPSS exploit probability (30 days) 87.2th percentile
5.5 MEDIUMCVSS 3.1
Unknownknown ransomware use
162days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-787 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD published | 2021-05-25 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-27562.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.