TOTOLINK EX200 Stack-Based Buffer Overflow Flaw (CVE-2026-114383) Rated CVSS 10
A newly published critical vulnerability in TOTOLINK EX200 carries a CVSS score of 10. Here is what is affected and how to respond.
Key points
- CVE-2026-114383 affects TOTOLINK EX200.
- CVSS 10 (Critical).
- No exploitation confirmed yet.
A critical stack-based buffer overflow tracked as CVE-2026-114383 has been published in the National Vulnerability Database for TOTOLINK EX200, with a CVSS base score of 10.
At a glance
- CVE
- CVE-2026-114383
- Product
- TOTOLINK EX200
- CVSS
- 10 Critical
- Weakness
- stack-based buffer overflow
- Exploited
- No known exploitation
What is the vulnerability?
The NVD entry states: 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 versions
| Vendor | Product | Versions |
|---|---|---|
| Totolink | EX200 | 5.2.3c.7200 |
Is it being exploited?
There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.
What should you do?
- Identify whether the affected product and versions run in your environment.
- Apply the vendor update listed in the advisory as soon as it is available.
- Limit network exposure of the affected service until it is patched.
- Monitor the vendor advisory for updated guidance or exploitation reports.
What to do and how to stay safe: CVE-2026-114383
- Vulnerability severity scores ignore your specific architecture and context.
- Exploitability depends on network exposure and user behavior, not just code flaws.
- Prioritization requires continuous asset inventory and threat intelligence alignment.
Risk-based vulnerability management focuses your limited resources on the flaws that actually threaten your business. Start by mapping your critical assets and checking for active exploits to prioritize your backlog.
Step-by-step guide: Risk-Based Vulnerability Management: Prioritize Fixes by Actual Danger
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-114383?
CVE-2026-114383 is a stack-based buffer overflow vulnerability in TOTOLINK EX200.
How severe is CVE-2026-114383?
It has a CVSS score of 10 Critical.
Is CVE-2026-114383 being exploited?
There is no public confirmation of exploitation at the time of publication.
