How to Fix CVE-2026-36959: n/a (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-36959 is a sibling vulnerability in the same vendor advisory as CVE-2026-36958. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 7.5 - High |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-36958 |
| Fixed in | Same patched build as CVE-2026-36958 (See vendor advisory) |
| Type (CWE) | n/a |
What's different about 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.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-36959
Apply the patched build per the primary write-up: How to Fix CVE-2026-36958.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-36959 fixed by the same patch as CVE-2026-36958?
Yes. CVE-2026-36959 ships in the same vendor advisory as CVE-2026-36958. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-36959?
The CVSS base score is 7.5 (High).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: http://u-speed.com
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-36959
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-36958
*Part of the n/a bundle. Full procedure at CVE-2026-36958.*