CVE-2021-23030

HIGH

7.5

CVSS Score

Published: September 14, 2021 at 08:43 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

Using BIG-IP Advanced WAF and BIG-IP ASM by N/A?

Get instant alerts when new vulnerabilities affect BIG-IP Advanced WAF and BIG-IP ASM - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploit prediction

EPSS 1.0%

Description

On BIG-IP Advanced WAF and BIG-IP ASM version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.3, 13.1.x before 13.1.4.1, and all versions of 12.1.x, when a WebSocket profile is configured on a virtual server, undisclosed requests can cause bd to terminate. 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%

12.1.0 ≤ v ≤ 12.1.613.1.0 ≤ v ≤ 13.1.414.1.0 ≤ v ≤ 14.1.415.1.0 ≤ v ≤ 15.1.316.0 ≤ 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%

12.1.0 ≤ v ≤ 12.1.613.1.0 ≤ v ≤ 13.1.414.1.0 ≤ v ≤ 14.1.415.1.0 ≤ v ≤ 15.1.316.0 ≤ 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/K42051445

References (1)

x_refsource_MISCMitigationVendor Advisory

Source: [email protected]

https://support.f5.com/csp/article/K42051445

CVSS

7.5HIGH[email protected]

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

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card