How severe is CVE-2026-36958?

CVE-2026-36958 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-36958 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-36958?

CVE-2026-36958 affects U-speed N300 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-36958?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-36958 have an EU (EUVD) identifier?

Yes. CVE-2026-36958 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26379.

When was CVE-2026-36958 published?

CVE-2026-36958 was published on 2026-04-30 and last updated on 2026-07-05.

CVE-2026-36958

CVE-2026-36958 is a high-severity vulnerability in U-speed N300 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26379
Weakness: CWE-400
Affected product: U-speed N300 Firmware
Published: 2026-04-30
Last modified: 2026-07-05

Description

A denial-of-service vulnerability exists in the U-SPEED N300 V1.0.0 wireless router. By sending a large number of concurrent HTTP requests to random or non-existent endpoints on the web management interface, an attacker can exhaust system resources in the embedded Boa HTTP server. This causes the router web interface to become unresponsive and may require manual reboot to restore normal operation.

Frequently asked questions

What is CVE-2026-36958?: A denial-of-service vulnerability exists in the U-SPEED N300 V1.0.0 wireless router. By sending a large number of concurrent HTTP requests to random or non-existent endpoints on the web management interface, an attacker can exhaust system resources in the embedded Boa HTTP server. This causes the router web interface to become unresponsive and may require manual reboot to restore normal operation.
How severe is CVE-2026-36958?: CVE-2026-36958 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-36958 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-36958?: CVE-2026-36958 affects U-speed N300 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-36958?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-36958 have an EU (EUVD) identifier?: Yes. CVE-2026-36958 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26379.
When was CVE-2026-36958 published?: CVE-2026-36958 was published on 2026-04-30 and last updated on 2026-07-05.

References

https://github.com/kirubel-cve/CVE-2026-36958

EU advisories (EUVD)

http://u-speed.com

Affected products (1)

cpe:2.3:o:u-speed:n300_firmware:1.0.0:*:*:*:*:*:*:*

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