Quick answers
- Is CVE-2026-20598 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20598 being exploited in the wild.
- How severe is CVE-2026-20598?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20598?
- 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-2026-20598 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-20598?
- 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 integer overflow in the MediaTek modem firmware leads to an out-of-bounds read when processing cellular base station signals. An attacker can exploit this by operating a rogue base station to trigger the overflow and crash the modem, resulting in remote denial of service. The vulnerability requires only network proximity (ability to broadcast a false base station) with no prior authentication or user interaction needed.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed