Vulnerability in U-Speed N300
CVE-2026-36959
U-SPEED N300 router V1.0.0 does not implement rate limiting or account lockout protections on the /api/login endpoint. This allows an attacker on the local network to perform unlimited authentication attempts, enabling brute-force attacks against the administrator account and potential unauthorized access to the router management interface.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- U-Speed N300
- U-Speed N300 Firmware — versions 1.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- u-speed.com (Broken Link)
- github.com/kirubel-cve/CVE-2026-36959 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-36959?
- CVE-2026-36959 is a high-severity vulnerability in U-Speed N300, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2026-04-30.
- How severe is CVE-2026-36959?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-36959 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.