Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
6.1

Physical device access allows local privilege escalation in secure boot

CVE-2026-20466 · published 3 months ago
Summary

A security flaw in secure boot allows an attacker with physical access to a device to gain higher-level access without needing a password or other authentication. This means an attacker could potentially take control of the device. Affected devices should be updated with the latest software patch to prevent this vulnerability.

Original advisory text
In sec boot, there is a possible escalation of privilege due to a heap buffer overflow. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no a...
In sec boot, there is a possible escalation of privilege due to a heap buffer overflow. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: AUTO00845351 (Note: For MT2737) / ALPS11072643 (Note: For MT6880, MT6890, MT6990); Issue ID: MSV-6929.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
6.1 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-787Out-of-bounds Write
Timeline
Published3 Aug 2026
Updated4 Nov 2026
First seen3 Aug 2026
Sources
CVE-2026-20466 · NVD
Track software like this
Free during beta