Quick answers
- Is CVE-2026-20548 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20548 being exploited in the wild.
- How severe is CVE-2026-20548?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20548?
- 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-2026-20548 attacked?
- It is attacked over the network or from the adjacent network, in device firmware.
- Am I affected by CVE-2026-20548?
- 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 MediaTek modem firmware leads to an out-of-bounds write condition. The vulnerability is triggered via over-the-air signaling from a rogue base station, requiring no prior authentication or privileges. Successful exploitation grants remote privilege escalation within the modem firmware context.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed