CVE-2022-1388

F5 BIG-IP Missing Authentication Vulnerability

Critical 9.8
Exploited: added to CISA KEV 10 May 2022
Used in ransomware campaigns

Description

On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all 12.1.x and 11.6.x versions, undisclosed requests may bypass iControl REST authentication. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Key facts

Published: 5 May 2022
Last changed: 21 Oct 2025
Assigned by: f5
KEV added: 10 May 2022
KEV fix due: 31 May 2022
Used in ransomware: Yes, according to CISA
EPSS: 99.954% likely to be exploited in the next 30 days, higher than 99.974% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

9.8CVSS 3.1, Criticalfrom the CNA (f5)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
F5	BIG-IP	17.0.0 up to but excluding 17.0.x* (unaffected) 16.1.x up to but excluding 16.1.2.2 (affected) 15.1.x up to but excluding 15.1.5.1 (affected) 14.1.x up to but excluding 14.1.4.6 (affected) 13.1.x up to but excluding 13.1.5 (affected) 12.1.x up to and including 12.1.6 (affected) 11.6.x up to and including 11.6.5 (affected)