Vulnerability · Published Oct 21, 2026 · Assigned by VulDB

CVE-2026-114382TOTOLINK EX200 lan.so cstecgi.cgi setStaticDhcpConfig 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 52% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.7%top 47.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in TOTOLINK EX200 5.2.3c.7200. This affects the function setStaticDhcpConfig of the file /cgi-bin/cstecgi.cgi of the component lan.so. The manipulation of the argument Comment results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may 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-424741 | TOTOLINK EX200 lan.so cstecgi.cgi setStaticDhcpConfig stack-based overflow vdb-entry, technical-description
VDB-424741 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-114382 | CVE Analysis and Report third-party-advisory
Submit #1019881 | TOTOLINK EX200 V5.2.3c.7200 Stack-based Buffer Overflow third-party-advisory
https://github.com/qwq-nm/CVE/blob/f5d61361eb7d846479f6d76c0aa4273e9af46d27/CVE1/report.md exploit
https://www.totolink.net/ product