Security readout for executives and security teams
Plain-English summary
CVE-2021-36198 affects Johnson Controls EntraPass before version 8.40. An unauthenticated attacker on an adjacent network could access sensitive data, with high confidentiality and integrity impact. The provided sources do not show active exploitation.
Executive priority
Treat this as a high-priority remediation item where EntraPass is deployed, especially in environments with weak segmentation. The business concern is unauthorized access to sensitive data in a security platform.
Technical view
The CVSS 3.1 vector is AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L with score 8.3. The issue is mapped to CWE-200 and affects all Johnson Controls EntraPass versions prior to 8.40. Evidence provided only states sensitive data access, not root cause details.
Likely exposure
Organizations running Johnson Controls EntraPass versions earlier than 8.40 are the likely exposed population. The attack vector is adjacent network, so exposure depends on who can reach the EntraPass network segment.
Exploitation context
The source bundle marks CISA KEV status as false and provides no cited evidence of active exploitation. The vulnerability is still serious because exploitation requires no privileges or user interaction once adjacent network reachability exists.
Researcher notes
Available evidence is limited to advisory-level metadata. The bundle does not provide protocol, component, or root-cause detail. Validation should focus on version confirmation, adjacency exposure, and advisory alignment rather than attempting exploit reproduction.
Mitigation direction
- Upgrade EntraPass systems running versions prior to 8.40.
- Restrict adjacent network access to EntraPass hosts and management interfaces.
- Review Johnson Controls and CISA guidance for supported remediation details.
- Monitor EntraPass-related systems for unusual access to sensitive data.
Validation and detection
- Inventory EntraPass deployments and record installed versions.
- Identify any EntraPass instance running below version 8.40.
- Verify network segmentation limits adjacent access to trusted systems.
- Review vendor and CISA advisory details for environment-specific checks.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-36198 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
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L2.85.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesCVE reference · x_refsource_CONFIRM
- ICS-CERT AdvisoryCVE reference · third-party-advisory, x_refsource_CERT
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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.