CVE-2021-23031

Name: CVE-2021-23031
Creator: NVD / NIST
Published: 2021-09-14T19:15:07.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 2.01%

Last modified Jun 17, 2026

CVE-2021-23031 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.4.1, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and 11.6.x before 11.6.5.3, an authenticated user may perform a privilege escalation on the BIG-IP Advanced WAF and ASM Configuration utility. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 2.01% chance of exploitation in the next 30 days.

Description

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.4.1, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and 11.6.x before 11.6.5.3, an authenticated user may perform a privilege escalation on the BIG-IP Advanced WAF and ASM Configuration utility. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

2.01%

78.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
F5	Big-Ip Advanced Web Application Firewall	>= 11.6.1, <= 11.6.5.2
F5	Big-Ip Advanced Web Application Firewall	>= 12.1.0, <= 12.1.5
F5	Big-Ip Advanced Web Application Firewall	>= 13.1.0, <= 13.1.3
F5	Big-Ip Advanced Web Application Firewall	>= 14.1.0, <= 14.1.4
F5	Big-Ip Advanced Web Application Firewall	>= 15.1.0, <= 15.1.2
F5	Big-Ip Advanced Web Application Firewall	>= 16.0.0, <= 16.0.1.1
F5	Big-Ip Application Security Manager	>= 11.6.1, <= 11.6.5.2
F5	Big-Ip Application Security Manager	>= 12.1.0, <= 12.1.5
F5	Big-Ip Application Security Manager	>= 13.1.0, <= 13.1.3
F5	Big-Ip Application Security Manager	>= 14.1.0, <= 14.1.4
F5	Big-Ip Application Security Manager	>= 15.1.0, <= 15.1.2
F5	Big-Ip Application Security Manager	>= 16.0.0, <= 16.0.1.1

References

https://support.f5.com/csp/article/K41351250Mitigation, Vendor Advisory
https://support.f5.com/csp/article/K41351250Mitigation, Vendor Advisory

Timeline

Published: Sep 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23031?

How severe is CVE-2021-23031?

CVE-2021-23031 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 2.01% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23031?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23031?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST