Security readout for executives and security teams
Plain-English summary
CVE-2026-36958 is a denial-of-service issue in the U-SPEED N300 V1.0.0 router web management interface. An unauthenticated network attacker can overwhelm the embedded Boa web server, making the router’s admin interface unresponsive and possibly requiring a manual reboot. This affects availability, not confidentiality or integrity, based on the provided sources.
Executive priority
Treat as a high-priority availability risk for affected routers, especially if administration is exposed beyond trusted networks. The likely business impact is management-plane outage and operational disruption, not data theft. Prioritize exposure reduction while awaiting or confirming vendor remediation.
Technical view
The vulnerability is classified as CWE-400 resource exhaustion. The CVSS 3.1 score is 7.5 High, with network attack vector, low complexity, no privileges, and no user interaction. The described condition involves many concurrent HTTP requests to random or non-existent management-interface endpoints exhausting Boa HTTP server resources.
Likely exposure
Exposure is most relevant where the U-SPEED N300 V1.0.0 web management interface is reachable by untrusted networks. The sources do not provide CPEs, broader affected versions, or vendor advisory details, so inventory confirmation is important.
Exploitation context
The CVE record states the attack is network-accessible and unauthenticated. CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation. Public detail exists in a GitHub reference, but the source bundle does not establish exploitation in the wild.
Researcher notes
Evidence is limited. The CVE lists affected vendor/product fields as n/a, while the description names U-SPEED N300 V1.0.0. No official patch, workaround, or exploitation-in-the-wild evidence is included in the provided sources. Avoid assuming additional models or firmware versions are affected.
Mitigation direction
- Check vendor guidance for firmware updates or official mitigation advice.
- Restrict management interface access to trusted administrative networks only.
- Disable remote administration if not required.
- Use network controls to limit unnecessary HTTP access to the router.
- Plan manual recovery procedures for affected devices if the interface becomes unresponsive.
Validation and detection
- Identify whether U-SPEED N300 V1.0.0 devices exist in the environment.
- Confirm whether web management is reachable from untrusted networks.
- Review firewall, ACL, and remote-management settings for the router.
- Check vendor or maintainer sources for updated firmware guidance.
- Monitor router availability and administrative interface responsiveness.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-36958 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/kirubel-cve/CVE-2026-36958CVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.