CVE-2026-36959 Auth bypass in n/a
Attackers on the local network can brute-force administrator credentials due to missing rate limiting on the login endpoint, leading to unauthorized router access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-36959?
CVE-2026-36959 is a high-severity authentication bypass vulnerability in n/a, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-307
Which versions are affected by CVE-2026-36959?
It affects 1 product.
Products include U-Speed N300 Firmware.
How do I fix CVE-2026-36959?
No fix has been published for CVE-2026-36959 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-36959 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36959 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vhpj-7mf7-qx3c.