Quick answers
- Is CVE-2026-28763 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-28763 being exploited in the wild.
- How severe is CVE-2026-28763?
- Critical severity, with a CVSS score of 9.1, published 20 October 2026.
- Which products and versions are affected?
- TOTOLINK X2000r TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.
- Is there a fix for CVE-2026-28763?
- 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-2026-28763 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-28763?
- Check whether you run TOTOLINK X2000r 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 exists in the formMapDelDevice() function of the boa web server on the X2000R. The vulnerability occurs when an authenticated POST request supplies a hostnameAdd parameter followed by an unchecked strcpy() of a hostname parameter into a 0x40-byte stack buffer (line [4] in the advisory), enabling stack frame corruption and return address overwrite. The attack requires prior authentication to the web interface and network access to the router's administrative port.
Affected products
- TOTOLINK X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327
Timeline
- 2026-10-20: disclosed