CVE-2024-4040 | Unauthenticated arbitrary file read and remote code execution in CrushFTP

Exp

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.

Published: 2024-04-22 Last update: 2026-02-26 Assigner: 430a6cef-dc26-47e3-9fa8-52fb7f19644e Source: 430a6cef-dc26-47e3-9fa8-52fb7f19644e
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-4040 is rated Critical Active Threat (99.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 94.43%, 100th percentile). CISA KEV confirms active exploitation (added 2024-04-24) affecting CrushFTP / CrushFTP. a weakness (CWE-1336) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2024-4040

Name: CrushFTP VFS Sandbox Escape Vulnerability · CISA KEV detail

Exploit added: 2024-04-24

Action due: 2024-05-01

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2024-4040

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-4040

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 94.27% 94.43% +0.15%
2 2025-11-18 94.41% 94.27% -0.14%
3 2025-04-15 — 94.41% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-4040

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 430a6cef-dc26-47e3-9fa8-52fb7f19644e
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 6.0 [email protected]

Weakness enumeration for CVE-2024-4040

Affected software / configurations for CVE-2024-4040

Vendor Product Version Raw CPE
crushftp crushftp >= 10.0.0, < 10.7.1 cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*
crushftp crushftp >= 11.0.0, < 11.1.0 cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*

References for CVE-2024-4040

URL Tags
https://github.com/airbus-cert/CVE-2024-4040 Exploit Third Party Advisory
https://www.bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/ Press/Media Coverage Third Party Advisory
https://www.crushftp.com/crush10wiki/Wiki.jsp?page=Update Patch Vendor Advisory
https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update Patch Vendor Advisory
https://www.rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/ Third Party Advisory
https://www.reddit.com/r/crowdstrike/comments/1c88788/situational_awareness_20240419_crushftp_virtual/ Exploit Issue Tracking
https://www.reddit.com/r/cybersecurity/comments/1c850i2/all_versions_of_crush_ftp_are_vulnerable/ Issue Tracking Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4040 US Government Resource
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