CVE-2021-27661
HIGHJohnson Controls F4-SNC Firmware - Authenticated Improper Privilege Management via Crafted Web Messages
Title source: llmDescription
Successful exploitation of this vulnerability could give an authenticated Facility Explorer SNC Series Supervisory Controller (F4-SNC) user an unintended level of access to the controller’s file system, allowing them to access or modify system files by sending specifically crafted web messages to the F4-SNC.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://www.johnsoncontrols.com/cyber-solutions/security-advisories
Third Party Advisory, US Government Resource third-party-advisory
x_refsource_cert
https://us-cert.cisa.gov/ics/advisories/icsa-21-182-01
Scores
CVSS v3
8.8
EPSS
0.0082
EPSS Percentile
52.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-269
CWE-863
Status
published
Products (1)
johnsoncontrols/f4-snc_firmware
11
Published
Jul 01, 2021
Tracked Since
Feb 18, 2026