Quick answers
- Is CVE-2026-20585 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20585 being exploited in the wild.
- How severe is CVE-2026-20585?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20585?
- 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-2026-20585 attacked?
- It is attacked from the adjacent network, in device firmware.
- Am I affected by CVE-2026-20585?
- 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
The vulnerability is a missing bounds check in the modem firmware that permits an out-of-bounds write operation. The attack vector is network-adjacent, requiring a UE (user equipment) to connect to an attacker-controlled rogue base station. Successful exploitation results in privilege escalation on the affected device.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed