CVE-2021-27661
8.8 · HIGHOverview
CVE-2021-27661 is a high-severity vulnerability affecting johnsoncontrols f4-snc_firmware. It was published on July 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from johnsoncontrols. Update f4-snc_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2021-27661?
CVE-2021-27661 is a high-severity vulnerability affecting johnsoncontrols f4-snc_firmware. It was published on July 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-27661?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-27661?
Check the references section for vendor advisories and patches from johnsoncontrols. Update f4-snc_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-27661?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-27661 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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