Quick answers
- Is CVE-2026-20562 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20562 being exploited in the wild.
- How severe is CVE-2026-20562?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20562?
- 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-2026-20562 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-20562?
- 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
An out of bounds write vulnerability exists in MediaTek modem firmware due to insufficient bounds validation. The vulnerability can be triggered remotely when a user equipment (UE) connects to an attacker-controlled base station, requiring only network-level access and no prior authentication. Successful exploitation results in denial of service of the modem component.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: advisory