CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2021-27661
High (8.8) in johnsoncontrols f4-snc firmware. EPSS 0.8% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-863, CWE-269
- Published
- Modified
- Record from
- the NVD, synced
Affected
- johnsoncontrols:f4-snc_firmware