CVE-2024-4040
KEVCrushFTP VFS Sandbox Escape Vulnerability
Description
CrushFTP contains an unspecified sandbox escape vulnerability that allows a remote attacker to escape the CrushFTP virtual file system (VFS).
A server side template injection vulnerability in CrushFTP in all versions before 10.7.1 and 11.1.0 on all platforms allows unauthenticated remote attackers to read files from the filesystem outside of the VFS Sandbox, bypass authentication to gain administrative access, and perform remote code execution on the server.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedApr 22, 2024
Last modifiedJun 17, 2026
Added to KEVApr 24, 2024
Remediation dueMay 1, 2024
References
- github.com/airbus-cert/CVE-2024-4040ExploitThird Party Advisory
- bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/Press/Media CoverageThird Party Advisory
- crushftp.com/crush10wiki/Wiki.jsp?page=UpdatePatchVendor Advisory
- crushftp.com/crush11wiki/Wiki.jsp?page=UpdatePatchVendor Advisory
- rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/Third Party Advisory
- reddit.com/r/crowdstrike/comments/1c88788/situational_awareness_20240419_crushftp_virtual/ExploitIssue Tracking
- reddit.com/r/cybersecurity/comments/1c850i2/all_versions_of_crush_ftp_are_vulnerable/Issue TrackingPatch
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4040US Government Resource
0 recent articles mention this CVE
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Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 908 days
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 99.5% · top 1% of all CVEs
- Weakness
- CWE-1336
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.