CVE-2021-3166
7.5 · HIGHOverview
CVE-2021-3166 is a high-severity vulnerability affecting asus dsl-n14u_b1_firmware. It was published on January 18, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
An issue was discovered on ASUS DSL-N14U-B1 1.1.2.3_805 devices. An attacker can upload arbitrary file content as a firmware update when the filename Settings_DSL-N14U-B1.trx is used. Once this file is loaded, shutdown measures on a wide range of services are triggered as if it were a real update, resulting in a persistent outage of those services.
Remediation
Check the references section for vendor advisories and patches from asus. Update dsl-n14u_b1_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-2021-3166?
CVE-2021-3166 is a high-severity vulnerability affecting asus dsl-n14u_b1_firmware. It was published on January 18, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-3166?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-3166?
Check the references section for vendor advisories and patches from asus. Update dsl-n14u_b1_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-2021-3166?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3166 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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