// For flags

CVE-2021-27562

Arm Trusted Firmware Out-of-Bounds Write Vulnerability

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

Attend
*SSVC
Descriptions

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.

En Arm Trusted Firmware M versión hasta 1.2, el mundo NS puede activar una detención del sistema, una sobrescritura de datos seguros o la impresión de datos seguros al llamar a funciones seguras en el modo de controlador NSPE

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.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
Active
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2021-02-22 CVE Reserved
  • 2021-05-25 CVE Published
  • 2021-11-03 Exploited in Wild
  • 2021-11-17 KEV Due Date
  • 2025-02-04 CVE Updated
  • 2025-06-15 EPSS Updated
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Arm
Search vendor "Arm"
 Trusted Firmware M
Search vendor "Arm" for product "Trusted Firmware M"
 <= 1.2
Search vendor "Arm" for product "Trusted Firmware M" and version " <= 1.2"
-
Affected
in Arm
Search vendor "Arm"
 Trusted Firmware M
Search vendor "Arm" for product "Trusted Firmware M"
--
Safe