What it is
CVE-2025-54309 is an unauthenticated vulnerability affecting CrushFTP CrushFTP. CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2025-54309
CrushFTP
CrushFTP / CrushFTP · affected before 10.8.5
- Severity
- CVSS 9.0 · Critical
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 94.4%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
CrushFTP / CrushFTP affected before 10.8.5.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
CrushFTP
CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.
Vendor
Product
Affected
Status
CrushFTP
CrushFTP
Before 10.8.5
Affected
CrushFTP
CrushFTP
Before 11.3.4_23
Affected
- Published
- 18 Jul 2025
- Exploitation Reported
- 01 Jun 2026
- Attack vector
- Remote
- Complexity
- High
- Privileges
- None
- User interaction
- None
Tags
cisa
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-54309
- crushftp.com/crush11wiki/Wiki.jsp crushftp.com · CVE Record https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025
- rapid7.com/blog/post/crushftp-zero-day-exploited-in-the... rapid7.com · CVE Record https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-w...
- bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in... bleepingcomputer.com · CVE Record https://www.bleepingcomputer.com/news/security/crushftp-zero-day-expl...
- vicarius.io/vsociety/posts/cve-2025-54309-detect-crushft... vicarius.io · CVE Record https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp...
- vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crush... vicarius.io · CVE Record https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushf...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:37 UTC |
| CISA | 2026-06-02 14:06 UTC |
| The Shadowserver | 2026-06-11 00:00 UTC |
| Daily CyberSecurity | 2026-06-17 19:20 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
9.0
Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
94.4%
Weaknesses
Recent mention · Daily CyberSecurity
Critical Apache Shiro LDAP Injection Flaw Uncovered
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Read full advisoryTimeline
From disclosure to observed exploitation
-
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2025-54309
Free JSON includes basic KEV fields{
"cve_id": "CVE-2025-54309",
"confidence": "Confirmed",
"cvss_score": 9.0,
"cvss_estimated": false,
"epss_score": 0.94362,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
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