CVE-2021-27856 FatPipe software administrative account with no password

Critical 9.8 Published 15 Dec 2021 Updated 17 Sep 2024

An administrative account with no password allows attackers to gain full control of FatPipe network software.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-27856?

CVE-2021-27856 is a critical vulnerability in FatPipe IPVPN, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 includes an account named "cmuser" that has administrative privileges and no password. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA002.

Which versions are affected by CVE-2021-27856?

It affects 3 products.

Products include Fatpipeinc Ipvpn Firmware, Fatpipeinc Mpvpn Firmware, Fatpipeinc Warp Firmware.

How do I fix CVE-2021-27856?

No fix has been published for CVE-2021-27856 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-27856 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-27856 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-8235-wx5q-8wrv.