CVE-2026-109109
CVE-2026-109109
A vulnerability was detected in Wavlink WL-WN530BE1-A 251117. This vulnerability affects the function strcpy of the file /cgi-bin/ExportAllSettings.cgi of the component Settings Export CGI. Performing a manipulation of the argument HTTP_COOKIE/X-Cmd results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- vuldb.com/vuln/416860 (technical-description, vdb-entry)
- vuldb.com/vuln/416860/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-109109 (third-party-advisory)
- vuldb.com/submit/909191 (third-party-advisory)
- gist.github.com/Rauzk/9ef4fe7574e5689386cc43139f4cf9e1 (exploit, broken-link)
Frequently asked questions
- What is CVE-2026-109109?
- CVE-2026-109109 is a critical-severity vulnerability, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2026-10-13.
- How severe is CVE-2026-109109?
- Critical severity. CVSS v3 base score is 10.0 out of 10.