# CVE-2010-20122: Xftp FTP Client <= 3.0 PWD Response Buffer Overflow

> Remote attackers can execute arbitrary code on Xftp client systems by sending a maliciously crafted PWD response from an FTP server.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Aug 2025
- **Updated:** 15 May 2026
- **Also known as:** GHSA-23ff-vxpg-784h

## What is CVE-2010-20122?

CVE-2010-20122 is a critical memory corruption vulnerability in NetSarang Computer, Inc. Xftp FTP Client, published on 21 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Xftp FTP Client version up to and including 3.0 (build 0238) contain a stack-based buffer overflow vulnerability triggered by a maliciously crafted PWD response from an FTP server. When the client connects to a server and receives an overly long directory string in response to the PWD command, the client fails to properly validate the length of the input before copying it into a fixed-size buffer. This results in memory corruption and allows remote attackers to execute arbitrary code on the client system.

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

## Which versions are affected by CVE-2010-20122?


## How do I fix CVE-2010-20122?

No fix has been published for CVE-2010-20122 yet. Limit exposure of the affected software until one is available.

## Is CVE-2010-20122 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-20122 exists.

Public exploit code:

- Xftp FTP Client 3.0 PWD Remote Buffer Overflow (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2010-20122 and fix it if it is affected.

What it is: CVE-2010-20122 is a critical memory corruption vulnerability in NetSarang Computer, Inc. Xftp FTP Client, published on 21 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-20122 exists.

Affected product: NetSarang Computer, Inc. Xftp FTP Client. 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-2010-20122/ (Markdown: https://insights.sbomify.com/CVE-2010-20122/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2010-20122
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2010-20122
- OSV: https://osv.dev/vulnerability/CVE-2010-20122

---
From sbomify Insights: https://insights.sbomify.com/CVE-2010-20122/
Summaries are generated and may contain mistakes; the official description above is the record.