PatchTheCVECVE-2021-27857: A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN softwa
CVE-2021-27857 is a high-severity flaw (CVSS 7.5) affecting ipvpn firmware, mpvpn firmware, warp firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, unauthenticated attacker to download a configuration archive. The attacker needs to know or correctly guess the hostname of the target system since the hostname is used as part of the configuration archive file name. Older versions of FatPipe software may also be vulnerable.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.9% (top 21%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2021-12-15 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-27857?
ipvpn firmware: mitigate or apply the listed mitigation; mpvpn firmware: mitigate or apply the listed mitigation; warp firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-27857 being exploited?
CVE-2021-27857 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-27857 affect?
CVE-2021-27857 affects ipvpn firmware, mpvpn firmware, warp firmware. Severity is high (CVSS 7.5). A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, unauthenticated attacker to download a configuration archive. The
How urgent is CVE-2021-27857?
Priority 51/100. High severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2021-27860 CRITICAL 9.8 EXPLOITED MITIGATE MITIGATE FatPipe WARP, IPVPN, and MPVPN Configuration Upload exploit
- CVE-2021-27859 HIGH 8.8 MITIGATE MITIGATE A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN softwa
- CVE-2021-27858 MEDIUM 5.3 MITIGATE MITIGATE A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN softwa
- CVE-2021-27856 CRITICAL 9.8 MITIGATE MITIGATE FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 includes an account named
- CVE-2021-27855 HIGH 8.8 MITIGATE MITIGATE FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, authenti