Quick answers
- Is CVE-2026-21030 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21030 being exploited in the wild.
- How severe is CVE-2026-21030?
- Informational severity, with a CVSS score of 6.4, published 5 June 2026.
- Which products and versions are affected?
- MediaTek Audio HAL prior to SMR Jun-2026 Release 1.
- Is there a fix for CVE-2026-21030?
- 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-2026-21030 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-21030?
- Check whether you run MediaTek Audio HAL 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
An improper access control vulnerability exists in the MediaTek Audio Hardware Abstraction Layer (HAL). The flaw allows a local attacker to bypass intended permission restrictions and execute privileged functions within the audio subsystem. According to the CVSS 4.0 vector provided by Samsung, the exploit has a high impact on the integrity and availability of the subsequent system (SC:H/SI:H/SA:H), though the initial confidentiality impact is negligible. The issue is addressed in the MediaTek SMR Jun-2026 Release 1 update.
Affected products
- MediaTek Audio HAL prior to SMR Jun-2026 Release 1
Timeline
- 2026-06-05: disclosed
- 2026-06-05: advisory