Quick answers
- Is CVE-2026-114383 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-114383 being exploited in the wild.
- How severe is CVE-2026-114383?
- Critical severity, with a CVSS score of 10, published 21 October 2026.
- Which products and versions are affected?
- TOTOLINK EX200 5.2.3c.7200.
- Is there a fix for CVE-2026-114383?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-114383 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-114383?
- Check whether you run TOTOLINK EX200 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow (CWE-121) exists in the setWiFiAclAddConfig function within /cgi-bin/cstecgi.cgi, where the unauthenticated macAddress parameter is processed by wireless.so without length validation. The handler tokenizes the parameter with strtok and copies each token into a fixed-size stack buffer using strcat, allowing an attacker to overflow the buffer and corrupt the stack frame. An attacker can send a malicious POST request over the network to trigger a denial of service or potentially achieve remote code execution with the elevated privileges of the wireless.so process.
Affected products
- TOTOLINK EX200 5.2.3c.7200
Timeline
- 2026-10-21: disclosed
- other: Exploit made available to the public