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Vulnerabilities

Vulnerability · CVE-2026-4227

A security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9.

Published Mar 16, 2026 · catalog updated Jun 17, 2026 · bl-wr9000 firmware

Check if you run it

No confirmed exploitation is on record for CVE-2026-4227. EPSS is 1.15%. Act only if a listed version of bl-wr9000 firmware is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.15%
Remediation
Advisory link
Affected products
cpe lb-link/bl-wr9000 firmware

A security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe lb-link/bl-wr9000 firmware2.4.9

How to fix CVE-2026-4227

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-4227. EPSS is 1.15%. Act only if a listed version of bl-wr9000 firmware is installed.

Which versions are affected?

Compare what you have installed with lb-link/bl-wr9000 firmware 2.4.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-119: Buffer Overflow; CWE-120: Classic Buffer Overflow; CWE-125: Out-of-bounds Read. EPSS 1.15%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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 security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

  2. Jun 17, 2026 · NIST NVD

    Updated

    A security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Sources

  • CVE.orgVulnerability recordCVE-2026-4227

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4227

    30-day exploitation probability 1.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-4227

    A security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed p

    nvd.nist.gov

References

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.