Buffer overflow in Totolink Ex200
CVE-2026-114383
A weakness has been identified in TOTOLINK EX200 5.2.3c.7200. This impacts the function setWiFiAclAddConfig of the file /cgi-bin/cstecgi.cgi of the component wireless.so. This manipulation of the argument macAddress causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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.
Affected products
- Totolink Ex200 — versions 5.2.3c.7200
Weakness classification (CWE)
References
- vuldb.com/vuln/424742 (technical-description, vdb-entry)
- vuldb.com/vuln/424742/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-114383 (third-party-advisory)
- vuldb.com/submit/1019883 (third-party-advisory)
- github.com/qwq-nm/CVE/blob/f5d61361eb7d846479f6d76c0aa4273e9af46d27/CVE2/report… (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-114383?
- CVE-2026-114383 is a critical-severity vulnerability in Totolink Ex200, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2026-10-21.
- How severe is CVE-2026-114383?
- Critical severity. CVSS v3 base score is 10.0 out of 10.