Quick answers
- Is CVE-2026-20593 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20593 being exploited in the wild.
- How severe is CVE-2026-20593?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Modem.
- Is there a fix for CVE-2026-20593?
- 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-2026-20593 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-20593?
- 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 improper input validation flaw in MediaTek modem firmware allows remote denial of service via malformed base station signals. A UE (user equipment, i.e., mobile device) connected to an attacker-controlled 5G/4G base station can be forced to crash the modem application without requiring the attacker to compromise the device itself. The condition is purely network-based with no user interaction necessary.
Affected products
- MediaTek Modem
Timeline
- 2026-11-02: disclosed
- 2026-11-02: advisory