Heap-Based Buffer Overflow in Wavlink WN530HG4B
CVE-2026-110958

10CRITICAL

Key Information:

Vendor

Wavlink

Status
Wn530hg4b
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110958?

A heap-based buffer overflow vulnerability exists in the Wavlink WN530HG4B due to improper handling in the api.cgi file. This flaw allows attackers to execute remote exploits. The issue can be mitigated by updating the firmware to the latest version, which resolves the vulnerability by eliminating unsafe command executions. The vendor has confirmed the issue and recommends all users to upgrade their devices promptly.

Affected Version(s)

WN530HG4B M30HG4B_V260724

WN530HG4B 2026-09-24-841a51c6d5_tclinux.bin

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-110958 - Proof of Concept

References

https://vuldb.com/vuln/420571
vdb-entry
https://vuldb.com/vuln/420571/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-110958
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

aissac (VulDB User)
VulDB CNA Team
.