CVE-2021-3166: asus dsl-n14u_b1_firmware
Vulnerability summary
CVE-2021-3166 is a high (CVSS 7.5) vulnerability in asus dsl-n14u_b1_firmware. EPSS estimates a 2.88% chance of exploitation in the next 30 days, higher than 86.7% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 18-01-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
2.88%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.88% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundKaisersource.Github.Io
Maturity: poc
Exploit Reference (kaisersource.github.io)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Asus1 product
- dsl-n14u_b1_firmware1.1.2.3_805
1 vendor · 1 product
References
2 links- github.com/kaisersource/kaisersource.github.io/blob/main/_posts/2021-01-17-dsl-n14u.mdX Refsource MISCExploitThird Party Advisory