# CVE-2019-25329: FTP Navigator 8.03 - 'Custom Command' Denial of Service (SEH)

> Attackers can crash FTP Navigator by sending a crafted payload to the custom command input, causing a denial of service.

- **Severity:** Medium 6.7 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Feb 2026
- **Updated:** 13 Feb 2026
- **Also known as:** GHSA-6qxf-3mq6-3g8x

## What is CVE-2019-25329?

CVE-2019-25329 is a medium-severity memory corruption vulnerability in Internet-Soft FTP Navigator, published on 12 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

FTP Navigator 8.03 contains a denial of service vulnerability that allows attackers to crash the application by overwriting Structured Exception Handler (SEH) with malicious input. Attackers can generate a payload of 4108 'A' characters followed by 4 'B' characters and 40 'C' characters to trigger a program crash when pasted into the custom command input.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2019-25329?

It affects 1 product.


Products: Internet-Soft Ftp Navigator.

## How do I fix CVE-2019-25329?

No fix has been published for CVE-2019-25329 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25329 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25329 exists.

## Other vulnerabilities in Internet-Soft FTP Navigator

- [CVE-2019-25321](https://insights.sbomify.com/CVE-2019-25321/): FTP Navigator 8.03 - Stack Overflow (SEH) (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25329 and fix it if it is affected.

What it is: CVE-2019-25329 is a medium-severity memory corruption vulnerability in Internet-Soft FTP Navigator, published on 12 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25329 exists.

Affected product: Internet-Soft FTP Navigator. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-25329/ (Markdown: https://insights.sbomify.com/CVE-2019-25329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25329
- OSV: https://osv.dev/vulnerability/CVE-2019-25329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-25329/
Summaries are generated and may contain mistakes; the official description above is the record.