Security readout for executives and security teams
Plain-English summary
FatPipe WARP, IPVPN, and MPVPN appliances could let a read-only authenticated user create a full administrator account through the web management interface. This is high risk because it turns limited access into control of a network appliance. The sources do not show confirmed active exploitation.
Executive priority
Treat this as a priority remediation for any affected FatPipe device, especially internet-reachable or broadly accessible management interfaces. It can turn a low-privilege account into administrative control, creating business risk around network confidentiality, routing integrity, and service availability.
Technical view
CVE-2021-27859 is a CWE-862 missing authorization issue in FatPipe web management before 10.1.2r60p91 and 10.2.2r42. It is remotely reachable, low complexity, requires low privileges, and needs no user interaction. Impact is high for confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely where FatPipe WARP, IPVPN, or MPVPN web management is reachable by read-only authenticated users. Versions 10.1 and 10.2 before the listed fixed builds are affected; sources say older versions may also be vulnerable.
Exploitation context
The attacker needs valid read-only credentials, then the flaw can allow administrative account creation. CISA KEV status in the bundle is false, and the provided sources do not confirm active exploitation in the wild.
Researcher notes
The bundle identifies missing authorization, not CSRF, despite one reference filename. The affected range is clear for 10.1 and 10.2, but older-version exposure is uncertain. Do not assume exploit prevalence; the provided evidence supports capability, not confirmed active exploitation.
Mitigation direction
- Upgrade to 10.1.2r60p91, 10.2.2r42, or later vendor-approved releases.
- Check FatPipe guidance for older versions that may also be vulnerable.
- Restrict web management access to trusted administration networks.
- Remove unnecessary read-only management accounts.
- Audit appliance administrator accounts for unexpected additions.
Validation and detection
- Inventory FatPipe WARP, IPVPN, and MPVPN appliances and record versions.
- Confirm web management is not reachable from untrusted networks.
- Review user lists for recently created administrator accounts.
- Check logs for read-only users performing account-management actions.
- Verify upgraded devices report fixed or later builds.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-27859 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5681.phpCVE reference · x_refsource_MISC
- https://www.fatpipeinc.com/support/cve-list.phpCVE reference · x_refsource_CONFIRM
- https://www.zeroscience.mk/codes/fatpipe_csrf.txtCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.