CVE-2026-20459 — MEDIUM (5.3)

Vulnerability Description

In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01816800; Issue ID: MSV-6842.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-288

References

https://corp.mediatek.com/product-security-bulletin/July-2026

FAQ

What is CVE-2026-20459?

CVE-2026-20459 is a vulnerability with a CVSS score of 5.3 (MEDIUM). In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with...

How severe is CVE-2026-20459?

CVE-2026-20459 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20459?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.