Threats / F5 / CVE-2021-22986
CVE-2021-22986
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-02
F5 BIG-IP and BIG-IQ Centralized Management vulnerability
F5 BIG-IP and BIG-IQ Centralized Management contain an unauthenticated remote code execution vulnerability in the iControl REST interface allowing attackers to execute commands, manipulate files, and disable services.
Verdict
Today item, not a backlog item.
An unauthenticated network attacker can exploit this authorization bypass to achieve arbitrary code execution on affected load balancers and management systems, enabling full system compromise and lateral movement within critical infrastructure.
CISA KEV Yes · 2021-11-034Ransomware use Flagged4EPSS 0.99898 (verify live)5Exploit Weaponized · public PoC6CVSS 9.8 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: total3
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
894 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 2021-11-03), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.99898 — 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 and BIG-IQ Centralized Management. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-863 Incorrect Authorization — weakness family: Authorization / access control.CWE assignment from the public NVD record (may be stale); 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 217 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 gain network access to the iControl REST interface without credentials.
Business
Perimeter security controls fail to prevent unauthorized access to critical infrastructure management interfaces.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary system commands on the target host.
Business
Attackers establish persistent access and control over load balancing and traffic management systems.
3
Lateral reach — past segmentation narrative 3
Attacker
I create, modify, or delete files to maintain persistence and exfiltrate configuration data.
Business
Sensitive network configurations, credentials, and operational data are compromised or destroyed.
4
Data at risk — exfiltration narrative 4
Attacker
I disable security services and monitoring to evade detection.
Business
Security visibility is eliminated, enabling undetected lateral movement and data theft.
5
Lights out — disruption & extortion narrative 5
Attacker
I leverage compromised infrastructure for ransomware deployment or supply chain attacks.
Business
Business operations are disrupted, customer data is at risk, and recovery costs escalate significantly.
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
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by f5CNA
Credited with finding itNo finder is named in the public CVE record or the scanned vendor advisory — attribution scoped to the sources checked.
Found an error? Propose a correction.
A correction is a cited counter-claim — it must cite a source,
gets reviewed by a second human, and is never auto-applied. See the
correction convention and our identity
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