CVE-2021-27856
9.8
CRITICAL · CVSS 3.1 · EPSS 5.6% (pctl 93)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 5.6% — more likely to be exploited than 93% of all CVEs |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-12-15 |
| Last modified | 2026-06-17 |
Affected (6)
| Vendor | Product |
|---|---|
| fatpipeinc | ipvpn |
| fatpipeinc | ipvpn firmware |
| fatpipeinc | mpvpn |
| fatpipeinc | mpvpn firmware |
| fatpipeinc | warp |
| fatpipeinc | warp firmware |
References
- https://www.fatpipeinc.com/support/cve-list.php
- https://www.zeroscience.mk/codes/fatpipe_backdoor.txt
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5684.php
- https://www.fatpipeinc.com/support/cve-list.php
- https://www.zeroscience.mk/codes/fatpipe_backdoor.txt
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5684.php
→ the Explorer · watch your stack · NVD