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Critical severity · published Feb 18, 2026
CVE-2019-25361
Ayukov NFTP client 1.71 - 'SYST' Buffer Overflow
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Ayukov NFTP client · Ayukov
1.71 · source: vendor
Affected product
AN
Ayukov NFTP client
Ayukov
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-25361
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-25361
ayukov.com
http://ayukov.com/nftp/
www.exploit-db.com
https://www.exploit-db.com/exploits/47576
www.vulncheck.com
https://www.vulncheck.com/advisories/ayukov-nftp-client-syst-buffer-overflow