Quick answers
- Is CVE-2026-20453 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20453 being exploited in the wild.
- How severe is CVE-2026-20453?
- 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-2026-20453?
- 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-2026-20453 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-20453?
- 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 (OOB) write vulnerability exists in MediaTek GenieZone (a hypervisor/TEE environment) due to insufficient bounds checking on input. A local attacker who has already compromised the 'System' privilege level can exploit this flaw to perform an unauthorized memory write. This can lead to a further escalation of privilege within the secure environment. The exploit does not require user interaction. MediaTek has released a fix under Patch ID ALPS10886526.
Affected products
- MediaTek GenieZone
Timeline
- 2026-06-01: disclosed
- 2026-06-01: advisory