CVE

CVE-2021-27856

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

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.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

warpipvpnmpvpn

Updated Nov 10, 2026View on NVD →

S4E scanner

criticalExposed Panels~10 seconds

FatPipe WARP/IPVPN/MPVPN - Backdoor Account

FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 contain an account named "cmuser" with administrative privileges and no password, letting attackers gain unauthorized admin access, exploit requires no authentication. References: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5684.php https://www.fatpipeinc.com/support/advisories.php https://www.fatpipeinc.com/support/cve-list.php https://www.zeroscience.mk/codes/fatpipe_backdoor.txt

Used 20 times · 10 assets checked · domain, subdomain, ipv4

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