CVE-2026-20556
Published Nov 2, 2026
CVSS 3.1 · 7.5 High
EPSS < 1%
KEV · Not listed
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.
Affected Products
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CVE record
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NVD configurations
No data
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Red Hat packages
No data
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OpenCVE enrichment
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| MediaTek, Inc. | MediaTek chipset | unaffected |
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No data.
No data.
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| Mediatek | Mediatek Chipset |
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| Mediatek, Inc. | Mediatek Chipset |
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Remediation
Tracking
Advisories
Metrics
No CVSS v4.0
Attack Vector Adjacent Network
Attack Complexity High
Privileges Required None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
User Interaction None
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.232% probability within 30 days)
Exploitation none
Automatable no
Technical Impact total
References
History
Nov 2, 2026 6:15 PM
Title updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Modem Out-of-Bounds Write Allows Remote Privilege Escalation via Rogue Base Station |
Nov 2, 2026 4:30 PM
Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Nov 2, 2026 11:45 AM
First appearance in the feed. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mediatek
Mediatek mediatek Chipset Mediatek, Inc. Mediatek, Inc. mediatek Chipset |
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| Vendors & Products |
Mediatek
Mediatek mediatek Chipset Mediatek, Inc. Mediatek, Inc. mediatek Chipset |
Nov 2, 2026 3:45 AM
Title updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Modem Out-of-Bounds Write Allows Remote Privilege Escalation via Rogue Base Station |
Nov 2, 2026 2:45 AM
Description updated. Weaknesses updated. Added references
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Weaknesses | CWE-787 | |
| References |
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Subscriptions
Weaknesses
