CVE-2019-25321Public exploit

User-assisted code execution via Custom Command overflow

Published Feb 12, 2026 · Updated Feb 12, 2026

Stack-based buffer overflow in InternetSoft FTP Navigator 8.03 allows local users to execute arbitrary code through the Custom Command textbox. The textbox accepts an oversized payload that overflows the stack and overwrites the nSEH and SEH control records. Exploitation requires a user to paste the crafted text and activate Do it; successful execution runs with that user's application privileges.

CVSS severity8.4
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in InternetSoft FTP Navigator 8.03 allows local users to execute arbitrary code through the Custom Command textbox. The textbox accepts an oversized payload that overflows the stack and overwrites the nSEH and SEH control records. Exploitation requires a user to paste the crafted text and activate Do it; successful execution runs with that user's application privileges.

The record

CVE
CVE-2019-25321
Published
Feb 12, 2026
Updated
Feb 12, 2026
Vendor
InternetSoft Corporation
Product
FTP Navigator
Classifications
CWE-121, T1204.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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.

  1. Affected versionversion=8.03

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

InternetSoft Corporation · FTP Navigatorversion=8.03

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.4VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1204.004User Execution Malicious Copy and Paste

Public exploit references

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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