Arbitrary code execution via oversized FTP response
Published Apr 4, 2026 · Updated Apr 4, 2026
Stack buffer overflow in Strawbits NICO FTP 3.0.1.19 allows remote attackers to execute arbitrary code via a malicious FTP server response. The FTP response handler copies an oversized 220 current-directory reply into a fixed stack buffer, overwriting SEH control data with attacker-supplied values. Exploitation requires the affected client to connect to the malicious server, after which shellcode runs in the client's user context.
Summary
What happened
Stack buffer overflow in Strawbits NICO FTP 3.0.1.19 allows remote attackers to execute arbitrary code via a malicious FTP server response. The FTP response handler copies an oversized 220 current-directory reply into a fixed stack buffer, overwriting SEH control data with attacker-supplied values. Exploitation requires the affected client to connect to the malicious server, after which shellcode runs in the client's user context.
The record
- CVE
- CVE-2018-25254
- Published
- Apr 4, 2026
- Updated
- Apr 4, 2026
- Vendor
- Strawbits
- Product
- NICO FTP
- Classifications
- CWE-787, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 4, 2026CVE publishedPublication date reported by the CVE source.
- Apr 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.0.1.19
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- NICO-FTP 3.0.1.19 SEH buffer-overflow exploitfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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