CVE-2026-20434

Name: CVE-2026-20434
Creator: NVD / NIST
Published: 2026-03-02T09:16:16.46+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-20434 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.22%

12.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mediatek	Lr12a	All versions
Mediatek	Lr13	All versions
Mediatek	Nr15	All versions
Mediatek	Nr16	All versions
Mediatek	Nr17	All versions

References

https://corp.mediatek.com/product-security-bulletin/March-2026Vendor Advisory

Timeline

Published: Mar 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20434?

How severe is CVE-2026-20434?

CVE-2026-20434 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20434?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20434?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST