# CVE-2021-27860: FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit

> Remote unauthenticated attackers can upload arbitrary files to any filesystem location in FatPipe WARP, IPVPN, and MPVPN software.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 10 Jan 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Dec 2021
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-hfgw-xgjr-v384

## What is CVE-2021-27860?

CVE-2021-27860 is a critical vulnerability in FatPipe IPVPN, published on 8 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p92 and 10.2.2r44p1 allows a remote, unauthenticated attacker to upload a file to any location on the filesystem. The FatPipe advisory identifier for this vulnerability is FPSA006.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2021-27860?

It affects 3 products.


Products: Fatpipeinc Ipvpn Firmware, Fatpipeinc Mpvpn Firmware, Fatpipeinc Warp Firmware.

## How do I fix CVE-2021-27860?

No fix has been published for CVE-2021-27860 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 24 Jan 2022.

## Is CVE-2021-27860 being exploited?

Yes. Attackers have exploited CVE-2021-27860 in the wild since at least 10 Jan 2022.

## Other vulnerabilities in FatPipe IPVPN

- [CVE-2021-27856](https://insights.sbomify.com/CVE-2021-27856/): FatPipe software administrative account with no password (critical 9.8)
- [CVE-2021-27855](https://insights.sbomify.com/CVE-2021-27855/): FatPipe software allows privilege escalation (high 8.8)
- [CVE-2021-27859](https://insights.sbomify.com/CVE-2021-27859/): Missing authorization vulnerability in FatPipe software (high 8.8)
- [CVE-2021-27857](https://insights.sbomify.com/CVE-2021-27857/): FatPipe software allows unauthenticated configuration download (high 7.5)
- [CVE-2021-27858](https://insights.sbomify.com/CVE-2021-27858/): Missing authorization vulnerability in FatPipe software (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27860 and fix it if it is affected.

What it is: CVE-2021-27860 is a critical vulnerability in FatPipe IPVPN, published on 8 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2021-27860 in the wild since at least 10 Jan 2022.

Affected product: FatPipe IPVPN. 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-2021-27860/ (Markdown: https://insights.sbomify.com/CVE-2021-27860/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27860
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27860
- OSV: https://osv.dev/vulnerability/CVE-2021-27860

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27860/
Summaries are generated and may contain mistakes; the official description above is the record.