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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2021-27860

FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit

FatPipe WARP, IPVPN, and MPVPN software

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.

CVSS
9.8
CRITICAL
EPSS
39.7%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
8 Dec 2021
CWE-434

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 10 January 2022. US federal agencies were required to remediate it by 24 January 2022.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 39.7%, which is higher than 98.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2021-27860 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2021-27860.

What does CVE-2021-27860 affect?

CVE-2021-27860 affects FatPipe WARP, IPVPN, and MPVPN software. 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.

How severe is CVE-2021-27860?

CVE-2021-27860 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 39.7%, higher than 98.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 24 January 2022.

How should organisations respond to CVE-2021-27860?

Apply the vendor patch for FatPipe WARP, IPVPN, and MPVPN software as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.