What is the CVSS score of CVE-2019-25361?

CVE-2019-25361 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of DNS are affected by CVE-2019-25361?

Ayukov NFTP client 1.71 contains a critical remote code execution vulnerability (CVSS 9.8) that allows unauthenticated attackers to gain complete system control without user interaction.

Is there a public PoC exploit available for CVE-2019-25361?

Yes, a public proof-of-concept exploit is available for CVE-2019-25361. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2019-25361?

Within 24 hours: Identify and inventory all systems running Ayukov NFTP client 1.71; immediately disable NFTP services or restrict network access to trusted hosts only. Within 7 days: Upgrade to the latest patched version of Ayukov NFTP client if available, or migrate to an alternative FTP solution; conduct network monitoring for exploitation attempts. Within 30 days: Complete deployment of patches across all affected systems; perform forensic analysis on vulnerable systems to detect prior compromise; review access logs and network traffic for indicators of exploitation.

DNS CVE-2019-25361

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-02-18 disclosure@vulncheck.com

DNS Buffer Overflow

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 19, 2026 - 15:53 vuln.today

Public exploit code

CVE Published

Feb 18, 2026 - 22:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Buffer overflow in Ayukov NFTP client 1.71 in SYST command handling allows remote FTP servers to execute arbitrary code on connecting clients. PoC available.

Technical ContextAI

CWE-121 stack overflow triggered by oversized SYST command response from a malicious FTP server.

Affected ProductsAI

Ayukov NFTP 1.71

RemediationAI

Update NFTP client. Validate server response lengths.

CVE-2019-25361 vulnerability details – vuln.today

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DNS CVE-2019-25361

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code