Quick answers
- Is CVE-2026-20581 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20581 being exploited in the wild.
- How severe is CVE-2026-20581?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Chipsets (multiple).
- Is there a fix for CVE-2026-20581?
- 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-2026-20581 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-20581?
- Check whether you run MediaTek Chipsets (multiple). 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 use-after-free vulnerability in the USB subsystem of MediaTek chipsets allows privilege escalation. The flaw requires that an attacker already possesses System privilege; the vulnerability then enables further escalation. The attack vector is local with no user interaction needed.
Affected products
- MediaTek Chipsets (multiple)
Timeline
- 2026-11-02: disclosed