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CVE-2021-27856

FatPipe software administrative account with no password

No known exploitation. EPSS puts it in the 93rd percentile. Fixed versions are out.

CVSS 3.19.8CriticalEPSS percentile93rd5.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix3 products2 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • FatPipe WARPAffected: ≥ 10.1, < 10.1.2r60p91Upgrade to: 10.1.2r60p91Affected: ≥ 10.2, < 10.2.2r42Upgrade to: 10.2.2r42Stated by: CVE record
  • FatPipe IPVPNAffected: ≥ 10.1, < 10.1.2r60p91Upgrade to: 10.1.2r60p91Affected: ≥ 10.2, < 10.2.2r42Upgrade to: 10.2.2r42Stated by: CVE record
  • FatPipe MPVPNAffected: ≥ 10.1, < 10.1.2r60p91Upgrade to: 10.1.2r60p91Affected: ≥ 10.2, < 10.2.2r42Upgrade to: 10.2.2r42Stated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free Nuclei and OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS93rd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

5.5% chance of exploitation activity in the next 30 days, which ranks it in the 93rd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 1653 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. EPSS band changehigh → low
  3. EPSS band changemoderate → high
  4. EPSS band changehigh → moderate
  5. Nuclei check added
  6. Patch availablerecord updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 9.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Ipvpn Firmware, not every advisory.