Security readout for executives and security teams
Plain-English summary
Johnson Controls Metasys UI has a high-severity SSRF issue in the MUI PDF export feature. An authenticated attacker could abuse that feature in affected Metasys 10 and 11 deployments. This matters because Metasys is building-control technology, so compromise can affect sensitive operational environments.
Executive priority
Treat as a high-priority OT/building-management remediation item. Prioritize internet-reachable or broadly reachable Metasys UI instances, then internal deployments with many authenticated users or weak segmentation.
Technical view
CVE-2021-36202 is a CWE-918 SSRF vulnerability affecting Johnson Controls Metasys: all 10 versions before 10.1.5 and all 11 versions before 11.0.2. CVSS 3.1 is 8.4 with network attack vector, low privileges required, no user interaction, changed scope, and high confidentiality and integrity impact.
Likely exposure
Exposure is most likely where Metasys UI is reachable by authenticated users, especially across broad internal networks or remote access paths. The source bundle identifies Metasys 10 and 11 only; it does not identify other Johnson Controls products as affected.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires authentication and is rated high complexity, but the potential impact remains serious because the vulnerability sits in an operational building-management platform.
Researcher notes
The source data is enough to identify product, affected major versions, fixed version thresholds, CVSS vector, and weakness class. It does not provide exploit details, indicators of compromise, or evidence of active exploitation; avoid claiming more than authenticated SSRF through MUI PDF export.
Mitigation direction
- Identify all Johnson Controls Metasys UI deployments and owners.
- Upgrade affected Metasys 10 systems to 10.1.5 or later guidance-approved versions.
- Upgrade affected Metasys 11 systems to 11.0.2 or later guidance-approved versions.
- Restrict Metasys UI access to authorized management networks and accounts.
- Check Johnson Controls and CISA guidance before applying compensating controls.
Validation and detection
- Confirm whether each deployment is Metasys 10 or 11.
- Record exact Metasys UI versions and compare against affected ranges.
- Verify only approved users can access MUI PDF export functionality.
- Review available logs for unusual authenticated PDF export activity.
- Confirm vendor advisory status and remediation evidence for each site.
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-918: 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36202 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
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L1.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.