CVE-2026-36958Public exploitNetwork attack vector

Unauthenticated service interruption via HTTP request flood

Published Apr 30, 2026 · Updated Apr 30, 2026

Denial of service in the Boa web interface of U-SPEED N300 1.0.0 allows remote attackers to make management unavailable. The embedded Boa server accepts 1,000 simultaneous GET requests for unique nonexistent paths without bounding concurrent resource use. No authentication or user interaction is required; the flood leaves the web interface unresponsive until a manual reboot restores operation.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Boa web interface of U-SPEED N300 1.0.0 allows remote attackers to make management unavailable. The embedded Boa server accepts 1,000 simultaneous GET requests for unique nonexistent paths without bounding concurrent resource use. No authentication or user interaction is required; the flood leaves the web interface unresponsive until a manual reboot restores operation.

The record

CVE
CVE-2026-36958
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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