High severity · published Sep 7, 2026
CVE-2026-20501
In vdec, there is a possible out of bounds write due to a heap buffer overflow
8.4
CVSS
0.2%
EPSS
No
On KEV
Description
In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT2718; MT6580; MT6739; MT6761; MT6765; MT6768; +34 more · source: vendor
MF
Mt2718 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6580 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6739 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6761 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6765 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6768 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6769 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6779 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6781 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6785 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6789 Firmware · Mediatek
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20501
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20501
Vendor Advisory
https://www.mediatek.com/product-security-bulletin/September-2026
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