#VU60267 Insecure Default Variable Initialization

Published: 2022-02-03

Vulnerability identifier: #VU60267

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41840


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Hardware solutions / Drivers



The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the SMM (System Management Mode) branch that registers a SWSMI handler does not sufficiently check or validate the allocated table variable EFI_BOOT_SERVICES. A remote authenticated attacker can overwrite the LocateProtocol or Freepool and execute arbitrary code on the system.

Install updates from vendor's website.

Vulnerable software versions

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability