A weakness has been identified in LB-LINK BL-WR9000 2.4.9.

Technical analysis

Mechanism and impact are interpreted from ingested advisories — not independent exploit research.

• CWE classification

  Buffer Overflow · Stack-based Buffer Overflow · Out-of-bounds Write

• Prerequisites and impact

  Follow the original vendor advisory for access prerequisites and impact. This catalog does not invent exploit conditions.

How to fix CVE-2026-4226

• Recommended remediation

  A patch or advisory reference is linked. Open the original publisher for availability by product version.

• Official advisories

  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov

What to do

Three reads of the same public record: the decision, the versions on file, and the signals. Confirm the vendor advisory before you patch. This page does not publish exploit steps.

Related intelligence

• Exploitation evidence

  Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

• Safe detection guidance

  Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Mar 16, 2026 · NIST NVD

   Detected

   A weakness has been identified in LB-LINK BL-WR9000 2.4.9. The affected element is the function sub_44E8D0 of the file /goform/get_virtual_cfg. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not res

2. Jun 17, 2026 · NIST NVD

   Updated

   A weakness has been identified in LB-LINK BL-WR9000 2.4.9. The affected element is the function sub_44E8D0 of the file /goform/get_virtual_cfg. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not res

Affected versions

Enter an installed version to get a verified affected / not-affected result against the ranges below.

• cpe lb-link/bl-wr9000 firmware2.4.9

Sources

• CVE.orgVulnerability recordCVE-2026-4226

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-4226

  30-day exploitation probability 1.1%

  first.org
• NIST NVDVulnerability recordCVE-2026-4226

  A weakness has been identified in LB-LINK BL-WR9000 2.4.9. The affected element is the function sub_44E8D0 of the file /goform/get_virtual_cfg. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made ava

  nvd.nist.gov

References

• Exploit · github.com
• Permissions Required · vuldb.com
• Third Party Advisory · vuldb.com
• Third Party Advisory · vuldb.com

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.