Quick answers
- Is CVE-2026-20455 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20455 being exploited in the wild.
- How severe is CVE-2026-20455?
- Informational severity, with a CVSS score of 0, published 1 June 2026.
- Which products and versions are affected?
- MediaTek geniezone.
- Is there a fix for CVE-2026-20455?
- 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-2026-20455 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-20455?
- Check whether you run MediaTek GenieZone. 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
An out-of-bounds write vulnerability (CWE-787) exists in MediaTek GenieZone due to a missing bounds check during memory operations. A local attacker who has already obtained 'System' level privileges can exploit this flaw to achieve further escalation of privilege within the secure environment. The exploit does not require user interaction. MediaTek has released a fix under Patch ID ALPS10873936 to address this issue by implementing proper boundary validation.
Affected products
- MediaTek geniezone
Timeline
- 2026-06-01: disclosed
- 2026-06-01: advisory