Vulnerability details

CVE-2026-110958

Wavlink WN530HG4B

Wavlink WN530HG4B api.cgi heap-based overflow

CVSS 4.0

10.0Critical

Official 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."

CVSS scores

Score	Version	Source	Vector
10.0Critical	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`
10.0Critical	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C`
10.0Critical	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C`
10.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C`

Affected products

Vendor	Product	Versions	Source
Wavlink	WN530HG4B	M30HG4B_V260724	CVEProject cvelistV5 (CNA)

References and advisories

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
https://vuldb.com/submit/933388 third-party-advisory
https://drive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_link exploit
https://dl.wavlink.com/firmware/RD/WN530BE2_WAVLINK-WO-2026-09-24-841a51c6d5_tclinux.bin patch

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Details

Published: 2026-10-15
Last updated: 2026-10-15
State: Published
Assigner (CNA): VulDB
Kolun priority: 41 · Medium

Exploit prediction (EPSS)

1.02%

Probability of exploitation in 30 days

63.5%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-122
Heap-based Buffer Overflow
CWE-119
Memory Corruption