High severity · published Jun 4, 2021
CVE-2021-27657
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…
8.8
CVSS
1.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Metasys · Johnsoncontrols
through 11.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27657
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27657
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01
Third Party Advisory
https://us-cert.gov/ics/advisories
Vendor Advisory
https://www.johnsoncontrols.com/cyber-solutions/security-advisories