Security readout for executives and security teams
Plain-English summary
Fortinet FortiClientEMS stored or exposed sensitive data without proper encryption in affected versions. An attacker with high privileges could inspect browser-decrypted data and disclose confidential information. This is an information-disclosure issue, not a direct integrity or availability flaw.
Executive priority
Treat this as a moderate confidentiality risk. Prioritize remediation for internet-reachable or broadly administered FortiClientEMS deployments, especially where EMS may handle sensitive endpoint-management data.
Technical view
CVE-2021-36189 affects FortiClientEMS 7.0.1 and below in the 7.0 branch, and 6.4.4 and below in the 6.4 branch. The CVSS 3.1 score is 6.8, with network access, low complexity, high privileges required, changed scope, and high confidentiality impact.
Likely exposure
Exposure is most likely in organizations running FortiClientEMS 7.0.1, 7.0.0, or 6.4.0 through 6.4.4. The source bundle does not identify other Fortinet products as affected.
Exploitation context
The CVE record describes information disclosure through inspecting browser-decrypted data. The CVSS vector requires high privileges. CISA KEV is false, and the provided sources do not state active exploitation in the wild.
Researcher notes
Evidence supports missing encryption of sensitive data and browser-decrypted-data inspection as the disclosure path. The provided bundle does not include exploit details, fixed versions, or confirmed exploitation. Avoid expanding scope beyond FortiClientEMS versions listed in the CVE data.
Mitigation direction
- Review Fortinet advisory FG-IR-21-140 for vendor-approved remediation guidance.
- Upgrade or remediate FortiClientEMS according to Fortinet guidance.
- Restrict FortiClientEMS administrative access to trusted administrators and networks.
- Rotate sensitive credentials if exposure through browser-decrypted data is suspected.
- Monitor FortiClientEMS administrative access for unusual activity.
Validation and detection
- Inventory FortiClientEMS installations and record exact versions.
- Confirm whether any instance runs 7.0.1 or below, or 6.4.4 or below.
- Review Fortinet advisory FG-IR-21-140 for fixed-version applicability.
- Check whether administrative browser access is tightly limited.
- Assess whether sensitive data exposure would require credential rotation.
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.
CVE-2021-36189 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
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N/E:H/RL:U/RC:C
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:H/UI:N/S:C/C:H/I:N/A:N/E:H/RL:U/RC:C2.34Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N/E:H/RL:U/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-21-140CVE reference · x_refsource_CONFIRM
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.