PT-2026-20536 · Unknown · Ayukov Nftp Client

Chase Hatch · Published 2026-02-18 · Updated 2026-02-18 · CVE-2019-25361

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Ayukov NFTP client version 1.71

Description The Ayukov NFTP client contains a buffer overflow issue in how it handles the SYST command. Remote attackers can exploit this by sending a specially crafted SYST command with an oversized payload. Successful exploitation allows the execution of arbitrary code, potentially leading to the execution of a bind shell on port 5150. The SYST command is vulnerable to a buffer overflow when processing oversized payloads.

Recommendations Update to a newer version of Ayukov NFTP client that addresses this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2019-25361

Affected Products

Ayukov Nftp Client

References · 4

• 🔥 https://exploit-db.com/exploits/47576 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-25361 · Security Note
• http://ayukov.com/nftp · Note
• https://vulncheck.com/advisories/ayukov-nftp-client-syst-buffer-overflow · Note