What is CVE-2019-25361?

CVE-2019-25361 is a critical-severity vulnerability in Ayukov Nftp Client, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-18.

How severe is CVE-2019-25361?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Ayukov Nftp Client

CVE-2019-25361

Ayukov NFTP client 1.71 contains a buffer overflow vulnerability in the SYST command handling that allows remote attackers to execute arbitrary code. Attackers can send a specially crafted SYST command with oversized payload to trigger a buffer overflow and execute a bind shell on port 5150.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (46.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ayukov Nftp Client — versions 1.71

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2019-25361?: CVE-2019-25361 is a critical-severity vulnerability in Ayukov Nftp Client, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-18.
How severe is CVE-2019-25361?: Critical severity. CVSS v3 base score is 9.8 out of 10.