CVE-2021-27856: FatPipe software administrative account with no password
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from . VulnCheck's own honeypots also recorded exploitation attempts.
- How likely is exploitation in the next 30 days?
- 5.5%
EPSS score, percentile 92.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- from 10.1 to before 10.1.2r60p91
- from 10.2 to before 10.2.2r42
- from 10.1 to before 10.1.2r60p91
- from 10.2 to before 10.2.2r42
- from 10.1 to before 10.1.2r60p91
- from 10.2 to before 10.2.2r42
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
FatPipe software administrative account with no password
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (3 products)
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p91 |
| Affected | from 10.2 to before 10.2.2r42 |
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p91 |
| Affected | from 10.2 to before 10.2.2r42 |
| Status | Versions |
|---|---|
| Affected | from 10.1 to before 10.1.2r60p91 |
| Affected | from 10.2 to before 10.2.2r42 |
Source: CVE List, as of . About the data.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
3
Known exploited FatPipe vulnerabilities
- CVE-2021-27860: FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit