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CVE-2021-27657

Metasys Improper Privilege Management

HIGH
8.8
CVSS Score
Published: June 4, 2021 at 02:07 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
1 product affected across 1 vendorMetasys

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Severity
HIGH8.8
Exploit prediction
EPSS 1%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Third Party Advisoryx_refsource_CERTUS Government Resource
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01
Third Party Advisoryx_refsource_CERTUS Government Resource
Source: [email protected]
https://us-cert.gov/ics/advisories
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.johnsoncontrols.com/cyber-solutions/security-advisories

CVSS

8.8HIGHjci
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-269

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