Vulnerability · Published Mar 16, 2026 · Assigned by VulDB

CVE-2026-4226LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in BL-WR9000 from LB-LINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.7%top 45.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 respond in any way.

Affected products (as reported)

Vendor	Product	Versions
LB-LINK	BL-WR9000	2.4.9

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-351149 | LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow vdb-entry, technical-description
VDB-351149 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #771207 | LB-LINK BL-WR9000 V2.4.9 over third-party-advisory
https://github.com/glkfc/IoT-Vulnerability/blob/main/LB-LINK/LB-LINK_VirtualRules%20stack%20overflow_EN.md exploit