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CVE-2026-110958— Wavlink WN530HG4B api.cgi heap-based overflow

Quick assessment

Affected
Wavlink WN530HG4B
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Wavlink WN530HG4B（固件版本 M30HG4B_V260724）中发现了一个漏洞。受影响的组件是文件 api.cgi 中的一个未知函数。该漏洞可导致基于堆的缓冲区溢出。攻击者可远程发起利用。目前该漏洞的利用代码已公开，可被实际使用。升级至固件版本 2026-09-24-841a51c6d5_tclinux.bin 即可解决此问题。建议受影响组件尽快进行升级。 厂商确认：“我们已确认该问题，并已修复。在最新固件中，api=info&client=app 处理逻辑不再构建 shell 命令：登录脚本现

CVSS 10.0 · Critical

Affected Version Matrix 2

VendorProduct Version RangeStatus
Wavlink WN530HG4B M30HG4B_V260724 affected
2026-09-24-841a51c6d5_tclinux.bin unaffected
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I. Basic Information for CVE-2026-110958

Vulnerability Information
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Vulnerability Title
Wavlink WN530HG4B api.cgi heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: "We confirm the finding, and it has already been addressed. In the current firmware the api=info&client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wavlink WN530HG4B M30HG4B_V260724 cpe:2.3:a:wavlink:wn530hg4b:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-110958

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III. Intelligence Information for CVE-2026-110958

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Other References for CVE-2026-110958 (2)

IV. Related Vulnerabilities

Same vendor: Wavlink
Same weakness: CWE-122

V. Comments for CVE-2026-110958

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