PatchTheCVECVE-2021-27858: A missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN softwa
CVE-2021-27858 is a medium-severity flaw (CVSS 5.3) 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 attacker to access at least the URL "/fpui/jsp/index.jsp" leading to unknown impact, presumably some violation of confidentiality. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA004.
Why this priority
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.8% (top 14%) |
| 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
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Nuclei scan template: FatPipe WARP/IPVPN/MPVPN - Authorization Bypass
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-2021-27858?
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-2021-27858 being exploited?
CVE-2021-27858 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-2021-27858 affect?
CVE-2021-27858 affects ipvpn firmware, mpvpn firmware, warp firmware. Severity is medium (CVSS 5.3). 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 attacker to access at least the URL "/fpui/jsp/index.jsp" leading
How urgent is CVE-2021-27858?
Priority 45/100. Remotely exploitable, no login, no user action
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