MediaTek MT8678 out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability marked as very critical has been reported in MediaTek MT2713, MT2718, MT2737, MT6781, MT6789, MT6813, MT6835, MT6855, MT6858, MT6878, MT6879, MT6880, MT6881, MT6886, MT6890, MT6895, MT6897, MT6899, MT6982VB, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT8188, MT8189, MT8370, MT8390, MT8676 and MT8678. The impacted element is an unknown function. The manipulation leads to out-of-bounds write. This vulnerability is referenced as CVE-2026-20553. The attack can only be performed from a local environment. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in MediaTek MT2713, MT2718, MT2737, MT6781, MT6789, MT6813, MT6835, MT6855, MT6858, MT6878, MT6879, MT6880, MT6881, MT6886, MT6890, MT6895, MT6897, MT6899, MT6982VB, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT8188, MT8189, MT8370, MT8390, MT8676 and MT8678 and classified as very critical. This issue affects an unknown code. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11468968; Issue ID: MSV-10166.

It is possible to read the advisory at mediatek.com. The identification of this vulnerability is CVE-2026-20553 since 11/03/2025. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/02/2026).

Applying the patch ALPS11468968 is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: ALPS11468968

Timelineinfo

11/03/2025 CVE reserved
11/02/2026 +364 days Advisory disclosed
11/02/2026 +0 days VulDB entry created
11/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: mediatek.com
Status: Confirmed

CNA: MediaTek
CVE: CVE-2026-20553 (🔒)

GCVE (CVE): GCVE-0-2026-20553
GCVE (VulDB): GCVE-100-429755

Entryinfo

Created: 11/02/2026 04:11
Changes: 11/02/2026 04:11 (53)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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