# CVE-2021-27562: A Arm Trusted Firmware bug is being used in attacks

Status: Being used now (CISA KEV, added 2021-11-03)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Arm Trusted Firmware (CVE-2021-27562) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2021-27562. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
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.

## Sources
- https://nvd.nist.gov/vuln/detail/CVE-2021-27562
- https://nvd.nist.gov/vuln/detail/CVE-2021-27562

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.