Vulnerability · Published Oct 21, 2026 · Assigned by VulDB

CVE-2026-114383TOTOLINK EX200 wireless.so cstecgi.cgi setWiFiAclAddConfig stack-based overflow

Critical 10.0

In plain English

A critical-severity stack buffer overflow in EX200 from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.7%top 48.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	EX200	5.2.3c.7200

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-424742 | TOTOLINK EX200 wireless.so cstecgi.cgi setWiFiAclAddConfig stack-based overflow vdb-entry, technical-description
VDB-424742 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-114383 | CVE Analysis and Report third-party-advisory
Submit #1019883 | TOTOLINK EX200 V5.2.3c.7200 Stack-based Buffer Overflow third-party-advisory
https://github.com/qwq-nm/CVE/blob/f5d61361eb7d846479f6d76c0aa4273e9af46d27/CVE2/report.md exploit
https://www.totolink.net/ product