CVE-2021-27661 is a high-severity vulnerability affecting Johnson Controls Facility Explorer SNC Series Supervisory Controllers (F4-SNC) and their firmware. An authenticated user can exploit this flaw by sending specially crafted web messages, gaining unintended access to the controller's file system, and potentially modifying or accessing system files. With a CVSS score of 8.8, this vulnerability allows for high impact on confidentiality, integrity, and availability with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
11CPE matchmatch criteria | cpe:2.3:o:johnsoncontrols:f4-snc_firmware:11:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.