CVE-2021-27562

MEDIUM5.5

CISA KEV

Published 2021-05-25 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2021-27562 is a medium-severity (CVSS 5.5) vulnerability in Arm Trusted Firmware. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by November 17, 2021. CISA does not currently list it as used in ransomware campaigns. Arm has 9 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 9 known-exploited Arm vulnerabilities →

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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-787CWE-787

CISA Known-Exploited Vulnerability

Product: Arm — Trusted Firmware

Name: Arm Trusted Firmware Out-of-Bounds Write Vulnerability

Date added: 2021-11-03 · Due: 2021-11-17

Required action: Apply updates per vendor instructions.

References

View on NVD

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