Improper access control in Intel BIOS firmware for BIG-IP

Published: 2022-06-23
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2021-33123
Exploitation vector Local
Public exploit N/A
Vulnerable software
Hardware solutions / Firmware

Vendor F5 Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper access control

EUVDB-ID: #VU63083

Risk: Low

CVSSv3.1: 7.2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-33123

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No


The vulnerability allows a local user to escalate privileges on the system

The vulnerability exists due to improper access restrictions in the BIOS authenticated code module. A local user can obtain elevated privileges on the system.


Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The following F5 hardware platforms are vulnerable to CVE-2021-33123:

  • BIG-IP i850
  • BIG-IP i2000 series
  • BIG-IP i4000 series
  • BIG-IP i5000 series
  • BIG-IP i7000 series
  • BIG-IP i10000 series
  • BIG-IP i11000 series
  • BIG-IP i15000 series
  • VIPRION B4450N
  • VELOS BX110 Blade

Vulnerable software versions

BIG-IP: 13.1.0 - 17.0.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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