Quick answers
- Is CVE-2026-90607 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90607 being exploited in the wild.
- How severe is CVE-2026-90607?
- Critical severity, with a CVSS score of 9.9, published 14 September 2026.
- Which products and versions are affected?
- TOTOLINK A3002MU Hh-B20211125.1046.
- Is there a fix for CVE-2026-90607?
- 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-2026-90607 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-90607?
- Check whether you run TOTOLINK A3002MU 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 buffer overflow vulnerability exists in the boa web server's formNewSchedule function, triggered by improper validation of the submit-url parameter in HTTP POST requests to /boafrm/formNewSchedule. The vulnerable code uses unsafe string-copy logic to copy user-supplied input into a fixed-size buffer without enforcing length boundaries, allowing an oversized parameter value to overwrite adjacent memory. The attack requires network reachability to the router's web interface but does not require authentication. Successful exploitation crashes the boa process, achieving denial of service of the web management interface. The vulnerability is publicly disclosed with proof-of-concept code available.
Affected products
- Totolink A3002MU Hh-B20211125.1046
Timeline
- 2026-09-14: disclosed: Vulnerability published on NVD
- 2026-09-14: exploited: Exploit code made public via GitHub