Quick answers
- Is CVE-2026-20549 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20549 being exploited in the wild.
- How severe is CVE-2026-20549?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20549?
- 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-2026-20549 attacked?
- It is attacked over the network or from the adjacent network.
- Am I affected by CVE-2026-20549?
- 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 in MediaTek modem firmware results from insufficient input validation when processing network traffic. The vulnerability can be triggered remotely by a device connected to an attacker-controlled base station, leading to privilege escalation and potentially arbitrary code execution. The attack requires network-adjacent access via a rogue base station but no authentication or special UE privileges.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed