In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

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.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.unisoc.com/en/support/product-security-bulletin/2109454821805424641 cve-icon cve-icon
History

Mon, 12 Oct 2026 02:15:00 +0000

Type Values Removed Values Added
Description In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.
Title Stack-based Buffer Overflow in Modem
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Unisoc

Published:

Updated: 2026-10-12T01:28:35.334Z

Reserved: 2026-07-24T02:05:12.603Z

Link: CVE-2026-66086

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-12T02:16:57.600

Modified: 2026-10-12T02:16:57.600

Link: CVE-2026-66086

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T03:30:04Z

Weaknesses