CVE-2021-23031

CRITICAL

9.9

CVSS Score

Published: September 14, 2021 at 06:07 PM UTC

Updated: June 17, 2026 at 03:38 AM UTC

2 products affected across 1 vendorBig IP Application Security ManagerBig IP Advanced Web Application Firewall

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Severity

CRITICAL9.9

Exploit prediction

EPSS 3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Advanced Web Application Firewall · F5

95%

11.6.1 ≤ v ≤ 11.6.5.212.1.0 ≤ v ≤ 12.1.513.1.0 ≤ v ≤ 13.1.314.1.0 ≤ v ≤ 14.1.415.1.0 ≤ v ≤ 15.1.216.0 ≤ v < 16.0.1.216.0.0 ≤ v ≤ 16.0.1.1

Affected range stops below 16.0.1.2, so it looks safe — our inference, not a vendor statement

Big IP Application Security Manager · F5

95%

11.6.1 ≤ v ≤ 11.6.5.212.1.0 ≤ v ≤ 12.1.513.1.0 ≤ v ≤ 13.1.314.1.0 ≤ v ≤ 14.1.415.1.0 ≤ v ≤ 15.1.216.0 ≤ v < 16.0.1.216.0.0 ≤ v ≤ 16.0.1.1

Affected range stops below 16.0.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.f5.com/csp/article/K41351250

References (1)

x_refsource_MISCMitigationVendor Advisory

Source: [email protected]

https://support.f5.com/csp/article/K41351250

CVSS

9.9CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-78

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