Threats / F5 / CVE-2022-1388
CVE-2022-1388
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
F5 BIG-IP vulnerability
F5 BIG-IP missing authentication vulnerability allows unauthenticated remote code execution, file manipulation, and service disruption.
Verdict
Today item, not a backlog item.
Critical missing authentication flaw in F5 BIG-IP enables remote attackers to execute arbitrary code, modify or delete files, and disable services without credentials. Active exploitation and ransomware deployment observed.
CISA KEV Yes · 2022-05-103Ransomware use Flagged3EPSS 0.99956 (verify live)4Exploit Weaponized · public PoC5
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
851 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-10), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.99956 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: F5, BIG-IP. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-306 Missing Authentication — weakness family: Authentication.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the F5 BIG-IP instance and send a crafted request to a critical function lacking authentication checks.
Business
Attacker gains initial network access to a critical infrastructure component with no authentication barrier.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary code on the compromised BIG-IP system to establish persistence and lateral movement.
Business
Attacker achieves code execution within the load balancer, potentially pivoting to protected backend systems.
3
Lateral reach — past segmentation narrative 3
Attacker
I manipulate or delete configuration files and disable BIG-IP services to disrupt traffic flow.
Business
Organization experiences service outages affecting all traffic routed through the compromised load balancer.
4
Data at risk — exfiltration narrative 4
Attacker
I deploy ransomware payloads across the infrastructure using the compromised BIG-IP as an entry point.
Business
Ransomware spreads to critical systems; organization faces encryption of data and operational shutdown.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05