CVE-2026-36959

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0007

Probability of exploitation

0.22%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-307 CWE-307

Affected Products

Vendor	Product	Versions
u-speed	n300_firmware	All
u-speed	n300	All

References

Exploits

https://github.com/kirubel-cve/CVE-2026-36959 https://github.com/kirubel-cve/CVE-2026-36959

Other References

http://u-speed.com

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-36959? +

CVE-2026-36959 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0007, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-36959? +

CVE-2026-36959 affects products from u-speed, specifically: n300, n300_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-36959? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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