Medium severity · published Oct 5, 2026
CVE-2026-20528
In ccci, there is a possible out of bounds write and read due to a missing bounds check
6.7
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT2735; MT2737; MT6813; MT6880; MT6890; MT6980D; +4 more · source: vendor
MF
Mt2735 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt2737 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6813 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6880 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6890 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6980d Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6986 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6986d Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6988 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6990 Firmware · Mediatek
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20528
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20528
www.mediatek.com
https://www.mediatek.com/product-security-bulletin/October-2026
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