CVE-2025-54309 on CISA KEV

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.

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

03Notes & references

• www.crushftp.com — https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025
• www.rapid7.com — https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/
• www.bleepingcomputer.com — https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-at…
• www.vicarius.io — https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerabil…
• www.vicarius.io — https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerab…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
CrushFTP	CrushFTP	10, 11

06Detection

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