---
id: "CVE-2021-27860"
kind: "vulnerability"
aliases: ["CVE-2021-27860"]
title: "FatPipe WARP, IPVPN, and MPVPN software: FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit"
severity: "critical"
cvss: 9.8
epss: 0.3968
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "FatPipe WARP, IPVPN, and MPVPN software", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "fatpipe", "infrastructure", "self-hosted", "vpn-appliance"]
not_affected_if: ["web-management-interface-not-exposed"]
published_at: "2021-12-08T17:15:10+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-27860", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-27860", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27860", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# FatPipe WARP, IPVPN, and MPVPN software: FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit

FatPipe WARP, IPVPN, and MPVPN software has a web management interface flaw that lets a remote attacker upload a file to any location on the filesystem. Uploading a file to a chosen path is typically enough to plant code and take over the appliance.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:FatPipe WARP, IPVPN, and MPVPN software affected ? fixed ?

## Fix

Apply updates per vendor instructions (CISA KEV required action); the fixed version is unknown from the sources.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-27860
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2021-27860
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-27860

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_