CVE-2021-27860 FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit
A vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software allows a remote, unauthenticated attacker to upload a file to any location on the filesystem.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 10 Jan 2022.
- Rated Critical severity (CVSS 9.8, scored by Vendor).
- It has been in the catalogue for 1,761 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
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.
Affected Versions
| Product | Versions |
|---|---|
| FatPipe WARP | 10.1 to before 10.1.2r60p92 10.2 to before 10.2.2r44p1 |
| FatPipe IPVPN | 10.1 to before 10.1.2r60p92 10.2 to before 10.2.2r44p1 |
| FatPipe MPVPN | 10.1 to before 10.1.2r60p92 10.2 to before 10.2.2r44p1 |
From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for FatPipe WARP, IPVPN, and MPVPN software. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
- 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
Vendor Advisories
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
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