What’s Vulnerable › Vulnerabilities

CVE-2021-27657: Metasys Improper Privilege Management

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-04 · updated 2026-06-17
• Weakness: CWE-269

Description

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.

Affected products

• Johnson Controls Metasys: through 11.0

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01
• https://us-cert.gov/ics/advisories
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
• https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01
• https://us-cert.gov/ics/advisories
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories

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