CVE-2026-20556

HighCVSS 7.5/10Last modified Nov 4, 2026

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 not needed for exploitation. Patch ID: MOLY01876662; Issue ID: MSV-9833.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
MediaTek, Inc.MediaTek chipsetMT2716; MT2735; MT2737; MT6813; MT6815; MT6833; MT6835; MT6853; MT6855; MT6858; MT6873; MT6875; MT6877; MT6878; MT6879; MT6880; MT6881; MT6883; MT6885; MT6886

References

Timeline

Published
Nov 2, 2026
Last modified
Nov 4, 2026
NVD status
Undergoing Analysis

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CVE-2026-20556: High severity, CVSS 7.5 | Vulnix