Is there a public PoC exploit available for CVE-2018-25366?

Yes, a public proof-of-concept exploit is available for CVE-2018-25366. Prioritise patching immediately. EPSS: 0.0%.

Cuteftp CVE-2018-25366

Q: What is the CVSS score of CVE-2018-25366?

CVE-2018-25366 has a CVSS 4.0 base score of 8.6 (High). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2018-21889 HIGH

Classic Buffer Overflow (CWE-120)

2026-05-25 VulnCheck

GHSA-3hrq-94cp-44pf

RCE Buffer Overflow Cuteftp

8.6

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.6 HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

May 26, 2026 - 19:52 NVD

8.4 (HIGH) 8.6 (HIGH)

CVE Published

May 25, 2026 - 14:15 cve.org

HIGH 8.6

DescriptionCVE.org

CuteFTP 5.0 XP contains a buffer overflow vulnerability that allows local attackers to execute arbitrary code by injecting malicious payload into the Site Manager label field. Attackers can craft a payload exceeding 520 bytes that overwrites the return address and executes shellcode when a shortcut is created and launched.

AnalysisAI

CuteFTP 5.0 XP contains a buffer overflow vulnerability that allows local attackers to execute arbitrary code by injecting malicious payload into the Site Manager label field. Rated high severity (CVSS 8.6), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. CuteFTP 5.0 XP contains a buffer overflow vulnerability that allows local attackers to execute arbitrary code by injecting malicious payload into the Site Manager label field. Attackers can craft a payload exceeding 520 bytes that overwrites the return address and executes shellcode when a shortcut is created and launched. Affected products include: Globalscape Cuteftp.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.