Exploited vulnerability · CISA KEV

Is CVE-2021-22986 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · F5 BIG-IP and BIG-IQ Centralized Management · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-22986, F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 217 days after it was published. It is known to be used in ransomware campaigns. It affects F5 BIG-IP and BIG-IQ Centralized Management, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

F5 BIG-IP and BIG-IQ Centralized Management contain a remote code execution vulnerability in the iControl REST interface that allows unauthenticated attackers with network access to execute system commands, create or delete files, and disable services.

What to do

1. Check whether you run it. Look for BIG-IP and BIG-IQ Centralized Management in your asset inventory, including appliances and cloud images. Stack check lists every exploited F5 CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 31 Mar 2021.
4. Get told next time. Email alerts when CISA adds a CVE for F5.

References

• nvd.nist.gov/vuln/detail/CVE-2021-22986

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · F5 scorecard · act-now radar.