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Fencer Intel
critical 9.8

CVE-2021-27860 kev in the critical feed json

Arbitrary file upload vulnerability in FatPipe software

published 4y ago modified 4mo ago also EUVD-2021-14598

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-01-10
epss
39.7%
EPSS 39.7% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • FatPipe WARP 10.1.2r60p92, 10.2.2r44p1
  • FatPipe IPVPN 10.1.2r60p92, 10.2.2r44p1
  • FatPipe MPVPN 10.1.2r60p92, 10.2.2r44p1

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Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
4y ago
Patch by
2022-01-24 (4y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
FatPipe, WARP, IPVPN, and MPVPN software
CISA name
FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1190 Exploit Public-Facing Application exploitation
  • T1505.003 Web Shell primary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
last yr.

Exploit prediction

39.68% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • ic3.gov https://www.ic3.gov/Media/News/2021/211117-2.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • FatPipe WARP
  • FatPipe IPVPN
  • FatPipe MPVPN

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.