Threats / Fortinet / CVE-2025-24472
CVE-2025-24472
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-19
Fortinet FortiOS and FortiProxy vulnerability
Fortinet FortiOS and FortiProxy authentication bypass vulnerability allows remote attackers to gain super-admin privileges via crafted CSF proxy requests. Actively exploited in ransomware campaigns.
Verdict
Today item, not a backlog item.
Remote attackers can bypass authentication mechanisms to obtain administrative access to FortiOS and FortiProxy systems without valid credentials. This critical privilege escalation enables full system compromise and lateral movement within protected networks.
CISA KEV Yes · 2025-03-185Ransomware use Flagged5EPSS 0.07235 (verify live)6CVSS 8.13CISA SSVC Exploitation: active · Automatable: no · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
22 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 2025-03-18), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.07235 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C) · Affected: Fortinet, FortiOS and FortiProxy. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.1, set at disclosure.
Weakness (CWE)
Mapped to CWE-288 Auth Bypass via Alternate Path — weakness family: Authentication.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · 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 35 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.
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 craft malicious CSF proxy requests to trigger the authentication bypass mechanism.
Business
Attackers gain unrestricted administrative access to security appliances protecting the organization's network perimeter.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I escalate my access to super-admin privileges, bypassing all role-based access controls.
Business
Complete control of firewall and proxy configurations enables attackers to disable security policies and monitoring.
3
Lateral reach — past segmentation narrative 3
Attacker
I modify firewall rules and proxy settings to establish persistent backdoors and exfiltration channels.
Business
Attackers maintain long-term access to the network and can move laterally to compromise internal systems and data.
4
Data at risk — exfiltration narrative 4
Attacker
I deploy ransomware payloads across the network using the compromised security infrastructure.
Business
Ransomware spreads undetected through the organization, encrypting critical systems and data for extortion.
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 fortinetCNA
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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