What is CVE-2018-25366?

CVE-2018-25366 is a high-severity vulnerability in Globalscape Cuteftp, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.4/10. Published 2026-05-25.

How severe is CVE-2018-25366?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in Globalscape Cuteftp

CVE-2018-25366

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.

Vulnerability class: Buffer Overflow

Published 2026-05-25 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (7.9th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Globalscape Cuteftp — versions 5.0.4

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.exploit-db.com/exploits/45259 (exploit)
installer.globalscape.com/pub/cuteftp/archive/english/cuteftp50.exe (product)
www.vulncheck.com/advisories/cuteftp-xp-buffer-overflow-via-site-manager-label-… (third-party-advisory)

Frequently asked questions

What is CVE-2018-25366?: CVE-2018-25366 is a high-severity vulnerability in Globalscape Cuteftp, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.4/10. Published 2026-05-25.
How severe is CVE-2018-25366?: High severity. CVSS v3 base score is 8.4 out of 10.