Metasys Improper Privilege Management
Priority MEDIUM 41CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
Successful exploitation of this vulnerability could give an authenticated Metasys user an unintended level of access to the server file system, allowing them to access or modify system files by sending specifically crafted web messages to the Metasys system. This issue affects: Johnson Controls Metasys version 11.0 and prior versions.
Why it matters now
EPSS 0.01245 69th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Johnson Controls | Metasys | 11.0 – 11.0 | — | No fix listed | CNA |
- Metasys VendorJohnson Controls Affected 11.0 – 11.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:johnsoncontrols:metasys:*:*:*:*:*:*:*:* | up to 11.0 | Vulnerable | Johnson Controls |
- cpe:2.3:a:johnsoncontrols:metasys:*:*:*:*:*:*:*:* Versions up to 11.0 Vulnerable ·Johnson Controls
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27657
- 2026-10-03 Alias added: GHSA-g3gv-gq3r-m3m6
References
Sources
- CVE-2021-27657 · CVE Program
- CVE-2021-27657 · NVD
- FIRST EPSS
- GHSA-g3gv-gq3r-m3m6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences