Quick answers
- Is CVE-2026-20564 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20564 being exploited in the wild.
- How severe is CVE-2026-20564?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20564?
- 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-2026-20564 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-20564?
- Check whether you run MediaTek Modem. 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
The vulnerability is an out of bounds write in the modem firmware resulting from improper bounds validation. It allows local attackers to write beyond allocated memory boundaries, causing a denial of service. The flaw requires local access but no elevated privileges or user interaction; exploitation results in service disruption rather than code execution.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed