Security readout for executives and security teams
Plain-English summary
This vulnerability affects Johnson Controls Metasys ADS/ADX/OAS servers version 10 and 11. An already authenticated user could become an administrator, creating risk to building-management operations, data confidentiality, and system integrity.
Executive priority
Prioritize remediation for internet-reachable or broadly accessible Metasys servers. The business risk is unauthorized administrative control over building-management infrastructure after credentialed access.
Technical view
CVE-2021-36207 is improper privilege management, mapped to CWE-269, in Metasys ADS/ADX/OAS servers. CVSS 3.1 is 8.8: network-accessible, low complexity, low privileges required, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Organizations running Metasys ADS, ADX, or OAS server versions 10 or 11 are in scope. Exposure is most relevant where authenticated user access exists over reachable networks.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The issue requires authenticated access, but successful abuse could grant administrator privileges.
Researcher notes
Evidence supports privilege escalation by an authenticated user, not unauthenticated compromise. The bundle does not provide exploit details, fixed versions, or proof of exploitation, so validation should focus on version exposure and account-control evidence.
Mitigation direction
- Inventory Metasys ADS/ADX/OAS servers and confirm versions.
- Check Johnson Controls and CISA advisory guidance for supported fixes or mitigations.
- Restrict Metasys server access to trusted management networks.
- Review user accounts and enforce least privilege.
- Monitor for unexpected administrator role changes.
Validation and detection
- Identify all Metasys ADS/ADX/OAS servers in asset records.
- Verify whether any server runs version 10 or 11.
- Review Metasys account roles for unnecessary elevated access.
- Check logs for recent privilege changes or suspicious authenticated activity.
- Compare current deployments against Johnson Controls advisory guidance.
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-269: 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-2021-36207 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.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.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.