CVE-2026-20528
Summary
| CVE | CVE-2026-20528 |
|---|---|
| State | PUBLISHED |
| Assigner | MediaTek |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-05 02:16:51 UTC |
| Updated | 2026-10-09 15:03:38 UTC |
| Description | In ccci, there is a possible out of bounds write and read due to a missing bounds check. This could lead to local information disclosure, memory corruption, crashes, or privilege escalation if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS11428950 (Note: For MT6880, MT6890) / ALPS10563453 (Note: For MT6980D, MT6990, MT6986, MT6986D, MT6813, MT6988) / AUTO00858766 (Note: For MT2735, MT2737); Issue ID: MSV-9893. |
Risk And Classification
Primary CVSS: v3.1 6.7 MEDIUM from ADP
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001190000 probability, percentile 0.016250000 (date 2026-10-11)
Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 6.7 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 6.7 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Mediatek | Mt2735 | - | All | All | All |
| Operating System | Mediatek | Mt2735 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt2737 | - | All | All | All |
| Operating System | Mediatek | Mt2737 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6813 | - | All | All | All |
| Operating System | Mediatek | Mt6813 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6880 | - | All | All | All |
| Operating System | Mediatek | Mt6880 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6890 | - | All | All | All |
| Operating System | Mediatek | Mt6890 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6980d | - | All | All | All |
| Operating System | Mediatek | Mt6980d Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6986 | - | All | All | All |
| Hardware | Mediatek | Mt6986d | - | All | All | All |
| Operating System | Mediatek | Mt6986d Firmware | - | All | All | All |
| Operating System | Mediatek | Mt6986 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6988 | - | All | All | All |
| Operating System | Mediatek | Mt6988 Firmware | - | All | All | All |
| Hardware | Mediatek | Mt6990 | - | All | All | All |
| Operating System | Mediatek | Mt6990 Firmware | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT2735 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT2737 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6813 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6880 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6890 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6980D | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6986 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6986D | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6988 | Not specified |
| CNA | MediaTek Inc. | MediaTek Chipset | affected MT6990 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.mediatek.com/product-security-bulletin/October-2026 | [email protected] | www.mediatek.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.