Quick answers
- Is CVE-2026-9827 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-9827 being exploited in the wild.
- How severe is CVE-2026-9827?
- 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-2026-9827?
- 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-2026-9827 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-9827?
- 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 path traversal vulnerability exists in the formUploadFile() function of the boa web server component, where user-supplied filename input from multipart form data is not properly validated before being passed to file write operations. An authenticated HTTP request to /boafrm/formUploadFile can bypass directory restrictions (CWE-22) and write files to arbitrary locations, enabling remote code execution through firmware modification or executable placement.
Affected products
- Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327
Timeline
- 2026-10-20: disclosed