CVE-2026-110958: critical vulnerability in Wavlink WN530HG4B
Wavlink WN530HG4B api.cgi heap-based overflow
Published
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 10epss 1.1%
from disclosure to weapon0 days
Published on NVDOct 15
1st PoCOct 15
exploitation probability
1.1%top 35% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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: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
Affected products
Wavlink · WN530HG4Bpublic PoCs found — 2
githubgithub.com/shlln/CVE-2026-110958★ 0cve_referencedrive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_linkunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://dl.wavlink.com/firmware/RD/WN530BE2_WAVLINK-WO-2026-09-24-841a51c6d5_tclinux.binhttps://drive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_linkhttps://vuldb.com/cve/CVE-2026-110958https://vuldb.com/submit/933388https://vuldb.com/vuln/420571https://vuldb.com/vuln/420571/cti