← Vulnerability feed

Vulnerability record · CVE-2021-27855 · published 15 December 2021

CVE-2021-27855: Fatpipeinc ipvpn firmware missing authorization vulnerability

Fatpipeinc · Ipvpn Firmware

FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, authenticated attacker with read-only privileges to grant themselves administrative privileges. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA001.

8.8 CVSS 3.1 High EPSS 1.6% · top 25.1% CWE-862 · Missing authorization
8.8CVSS 3.1 base score, v2 6.5
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, authenticated attacker with read-only privileges to grant themselves administrative privileges. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA001.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.fatpipeinc.com/support/cve-list.php Vendor Advisory
https://www.zeroscience.mk/codes/fatpipe_privesc.txt Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5685.php Third Party Advisory
https://www.fatpipeinc.com/support/cve-list.php Vendor Advisory
https://www.zeroscience.mk/codes/fatpipe_privesc.txt Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5685.php Third Party Advisory

Track CVE-2021-27855 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2021-27860FatPipe WARP/IPVPN/MPVPN web interface unrestricted file uploadThe web management interface of FatPipe WARP, IPVPN and MPVPN before 10.1.2r60p92 and 10.2.2r44p1 allows an unauthenticated remote attacker to upload…KEVEPSS 40%analysed9.8CVE-2021-27856Fatpipeinc ipvpn firmware vulnerabilityFatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 includes an account named "cmuser" that has administrative privi…EPSS 5.6%8.8CVE-2021-27859Fatpipeinc ipvpn firmware missing authorization vulnerabilityA missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 1…EPSS 1.6%7.5CVE-2021-27857Fatpipeinc ipvpn firmware missing authorization vulnerabilityA missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 1…EPSS 1.8%5.3CVE-2021-27858Fatpipeinc ipvpn firmware missing authorization vulnerabilityA missing authorization vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 1…EPSS 2.7%9.9CVE-2026-84869ScreenConnect client allows unauthorized file transfer and execution in remote sessionsA flaw in the ConnectWise ScreenConnect client lets files be transferred and executed inside an active remote session without authorization or Host c…KEVEPSS 0.92%analysed7.8CVE-2022-0492Linux kernel cgroups v1 release_agent privilege escalation and container escapeThe Linux kernel's cgroup_release_agent_write in kernel/cgroup/cgroup-v1.c mishandles authorization, letting the cgroups v1 release_agent feature be …KEVEPSS 5.5%analysed9.9CVE-2024-57726SimpleHelp missing authorization lets low-privilege technicians escalate to adminSimpleHelp remote support software v5.5.7 and earlier fails to properly authorize API key creation, allowing low-privilege technicians to mint API ke…KEVEPSS 67%analysed

Source: NIST National Vulnerability Database (record CVE-2021-27855), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.