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HIGH · 7.5

CVE-2026-20434

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 atta...

Vulnerability 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 Score

7.5

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MediatekLr12A-
MediatekLr13-
MediatekNr15-
MediatekNr16-
MediatekNr17-
MediatekMt2735-
MediatekMt2737-
MediatekMt6739-
MediatekMt6761-
MediatekMt6762-
MediatekMt6762D-
MediatekMt6762M-
MediatekMt6763-
MediatekMt6765-
MediatekMt6765T-
MediatekMt6767-
MediatekMt6768-
MediatekMt6769-
MediatekMt6769K-
MediatekMt6769S-

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2026-20434?

CVE-2026-20434 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 atta...

How severe is CVE-2026-20434?

CVE-2026-20434 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20434?

Check the references section above for vendor advisories and patch information. Affected products include: Mediatek Lr12A, Mediatek Lr13, Mediatek Nr15, Mediatek Nr16, Mediatek Nr17.