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critical·Exposed Panels·Updated Oct 8, 2025

FatPipe WARP/IPVPN/MPVPN - Backdoor Account

Est. Time~10 seconds
Scan TypeGroup Scan
Targetsdomain, subdomain, ipv4
CostFree
3.2k
Times Used
continuous scan runs
0
Continuously Checked
assets under CS
3
Vulnerabilities Found
confirmed findings
References
CVECVE-2021-27856
9.8
CVSScritical
Exploitable remotely over the internet · no authentication required.

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
Affected
WARPby FatPipe
AFFECTED< 10.1.2r60p91SAFE ✓≥ 10.1.2r60p91
IPVPNby FatPipe
AFFECTED< 10.1.2r60p91SAFE ✓≥ 10.1.2r60p91
MPVPNby FatPipe
AFFECTED< 10.1.2r60p91SAFE ✓≥ 10.1.2r60p91
Updated Sep 9, 2026View on NVD →

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FatPipe WARP/IPVPN/MPVPN - Backdoor Account CVE-2021-27856 Scanner | S4E