Threats / F5 / CVE-2022-1388
CVE-2022-1388
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
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 · 2022-05-105Ransomware use Flagged5EPSS 0.99958 (verify live)6Exploit Weaponized · public PoC7CVSS 9.83CISA SSVC Exploitation: active · Automatable: yes · Impact: total4
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
887 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 0.99958 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: F5, BIG-IP. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.1, set at disclosure.
Weakness (CWE)
Mapped to CWE-306 Missing Authentication — weakness family: Authentication.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 5 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a functional/weaponized public exploit). Catalog entries: Metasploit module, nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
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