# CVE-2026-20600: MediaTek Modem logic error denial of service

Source: https://junglewise.ai/threats/cve-2026-20600-in-modem-there-is-a-possible-application-crash-due-to-a-logic  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-20600 · Severity: info · Published 2026-11-02

A logic error in MediaTek's modem firmware can cause the application to crash when a user device connects to a malicious base station, leading to service disruption. An attacker operating a rogue 5G base station can trigger this crash remotely without requiring the victim to take any action. The result is a denial of service that disables cellular connectivity until the device recovers.

Technologies: [MediaTek Modem](https://junglewise.ai/threats/technologies/modem). Vendors: [MediaTek](https://junglewise.ai/threats/vendors/mediatek).

## Quick answers

**Is CVE-2026-20600 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-20600 being exploited in the wild.

**How severe is CVE-2026-20600?** Informational severity, published 2 November 2026.

**Which products and versions are affected?** MediaTek Modem.

**Is there a fix for CVE-2026-20600?** 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-2026-20600 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-20600?** 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

A logic error in the MediaTek modem firmware allows remote denial of service when a user equipment connects to an attacker-controlled base station. The vulnerability requires network proximity (adjacent attack vector via rogue base station) but no additional privileges or user interaction. Exploitation causes an application crash, disabling modem functionality until recovery.

## Affected products

- MediaTek Modem

## Timeline

- 2026-11-02: advisory

## References

- [https://www.mediatek.com/product-security-bulletin/November-2026](https://www.mediatek.com/product-security-bulletin/November-2026)

## Related threats

- [MediaTek Modem privilege escalation via permissions bypass](https://junglewise.ai/threats/cve-2026-68591-in-modem-there-is-a-possible-escalation-of-privilege-due-to-a)
- [MediaTek Modem out-of-bounds write privilege escalation](https://junglewise.ai/threats/cve-2026-68589-in-modem-there-is-a-possible-out-of-bounds-write-due-to-a-missing)
- [MediaTek Modem integer overflow denial of service](https://junglewise.ai/threats/cve-2026-68588-in-modem-there-is-a-possible-way-for-xxx-to-xxxxx-due-to-an)
- [MediaTek Modem privilege escalation due to missing permission check](https://junglewise.ai/threats/cve-2026-20599-in-modem-there-is-a-possible-escalation-of-privilege-due-to-a)
- [MediaTek Modem integer overflow out-of-bounds read](https://junglewise.ai/threats/cve-2026-20598-in-modem-there-is-a-possible-out-of-bounds-read-due-to-an-integer)