Quick answers
- Is CVE-2026-10259 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-10259 being exploited in the wild.
- How severe is CVE-2026-10259?
- High severity, with a CVSS score of 8.8, published 1 June 2026.
- Which products and versions are affected?
- H3C Magic B0 Up to 100R002.
- Is there a fix for CVE-2026-10259?
- 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-2026-10259 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-10259?
- Check whether you run H3C Magic B0 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 vulnerability exists in the H3C Magic B0 router firmware up to version 100R002. The flaw is located within the 'SetMobileAPInfoById' function in the '/goform/aspForm' component. The vulnerability is triggered by insufficient length validation when processing the 'param' argument in a POST request. A remote attacker with low privileges can exploit this by sending a specially crafted HTTP request to cause a buffer overflow, potentially leading to a denial of service (DoS) or remote code execution (RCE). Public exploit code (PoC) has been disclosed, and the vendor has reportedly not responded to the disclosure.
Affected products
- H3C Magic B0 Up to 100R002
Timeline
- 2026-06-01: disclosed: Public disclosure of the vulnerability and PoC.
- 2026-06-01: advisory: NVD published the CVE record.