CVE-2021-27860

Arbitrary file upload vulnerability in FatPipe software

Critical 9.8
Exploited: added to CISA KEV 10 Jan 2022

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.

Key facts

Published: 8 Dec 2021
Last changed: 21 Oct 2025
Assigned by: certcc
KEV added: 10 Jan 2022
KEV fix due: 24 Jan 2022
EPSS: 39.68% likely to be exploited in the next 30 days, higher than 98.643% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

9.8CVSS 3.1, Criticalfrom the CNA (certcc)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
FatPipe	WARP	10.1 up to but excluding 10.1.2r60p92 (affected) 10.2 up to but excluding 10.2.2r44p1 (affected)
FatPipe	IPVPN	10.1 up to but excluding 10.1.2r60p92 (affected) 10.2 up to but excluding 10.2.2r44p1 (affected)
FatPipe	MPVPN	10.1 up to but excluding 10.1.2r60p92 (affected) 10.2 up to but excluding 10.2.2r44p1 (affected)