Is CVE-2026-20588 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-20588 being exploited in the wild.

How severe is CVE-2026-20588?

Medium severity, with a CVSS score of 6.7, published 5 October 2026.

Which products and versions are affected?

MediaTek Dimensity chipsets Multiple chipsets including MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896.

Is there a fix for CVE-2026-20588?

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-2026-20588 attacked?

It is attacked with local access, in device firmware.

Am I affected by CVE-2026-20588?

Check whether you run MediaTek Dimensity chipsets at an affected version. 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.

CVE-2026-20588: MediaTek mtee privilege escalation due to missing bounds check

CVE-2026-20588 · Severity: medium · CVSS 6.7 · Published 2026-10-05

MediaTek's mtee component, used in smartphone and IoT chipsets, contains a missing bounds check that allows privilege escalation. An attacker who has already obtained System privilege could exploit this flaw to further elevate their access within the device. No user interaction is required for exploitation.

Vendors: MediaTek.

Quick answers

Is CVE-2026-20588 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-20588 being exploited in the wild.
How severe is CVE-2026-20588?: Medium severity, with a CVSS score of 6.7, published 5 October 2026.
Which products and versions are affected?: MediaTek Dimensity chipsets Multiple chipsets including MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896.
Is there a fix for CVE-2026-20588?: 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-2026-20588 attacked?: It is attacked with local access, in device firmware.
Am I affected by CVE-2026-20588?: Check whether you run MediaTek Dimensity chipsets at an affected version. 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 missing bounds check in the mtee component allows out-of-bounds memory access, enabling local privilege escalation. The vulnerability requires the attacker to already possess System privilege but does not require user interaction. This is a post-compromise escalation vector within trusted execution environments on MediaTek chipsets.

Affected products

MediaTek Dimensity chipsets Multiple chipsets including MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896

Timeline

2026-10-05: disclosed
2026-10-05: advisory: MediaTek Product Security Bulletin October 2026; Issue ID MSV-9607; Patch ID ALPS11383899

References

https://www.mediatek.com/product-security-bulletin/October-2026

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