Is CVE-2026-20434 actively exploited?

CVE-2026-20434 has no public evidence of in-the-wild exploitation as of 2026-03-02.

What is the CVSS score for CVE-2026-20434?

CVE-2026-20434 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2026-20434?

Patch guidance is available from mediatek security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-20434.

Fix CVE-2026-20434 - HIGH mediatek lr12a

Q: Which products are affected by CVE-2026-20434?

5 products: mediatek lr12a, mediatek lr13, mediatek nr15, mediatek nr16, mediatek nr17.

Description

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY00782946; Issue ID: MSV-4135.

CVSS Metrics

Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: adjacent network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: MEDIATEK
Published: 3/2/2026
Last Modified: 3/2/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mediatek : lr12amediatek : lr13mediatek : nr15mediatek : nr16mediatek : nr17

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-20434. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-20434

View on NIST NVD

CVE-2026-20434 vulnerability