MediaTek MT8910 vdec out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.2$0-$5k0.70+

Summaryinfo

A vulnerability classified as very critical was found in MediaTek MT2718, MT6768, MT6769, MT6789, MT6833, MT6855, MT6877, MT8186, MT8188, MT8189, MT8195, MT8196, MT8367, MT8391, MT8395, MT8668, MT8676, MT8678, MT8696, MT8781, MT8788E, MT8792, MT8793, MT8799 and MT8910. This vulnerability affects unknown code of the component vdec. Such manipulation leads to out-of-bounds write. This vulnerability is traded as CVE-2026-20586. The attack may be launched remotely. There is no exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in MediaTek MT2718, MT6768, MT6769, MT6789, MT6833, MT6855, MT6877, MT8186, MT8188, MT8189, MT8195, MT8196, MT8367, MT8391, MT8395, MT8668, MT8676, MT8678, MT8696, MT8781, MT8788E, MT8792, MT8793, MT8799 and MT8910. It has been rated as very critical. Affected by this issue is an unknown function of the component vdec. 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. CVE summarizes:

In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9614.

The advisory is shared for download at mediatek.com. This vulnerability is handled as CVE-2026-20586 since 11/03/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/05/2026).

Applying the patch ALPS11383899 is able to eliminate this problem.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.2

VulDB Base Score: 9.6
VulDB Temp Score: 9.2
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: No
Local: No
Remote: Yes

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: ALPS11383899

Timelineinfo

11/03/2025 CVE reserved
10/05/2026 +335 days Advisory disclosed
10/05/2026 +0 days VulDB entry created
10/05/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: mediatek.com
Status: Confirmed

CVE: CVE-2026-20586 (🔒)
GCVE (CVE): GCVE-0-2026-20586
GCVE (VulDB): GCVE-100-413504

Entryinfo

Created: 10/05/2026 04:35
Changes: 10/05/2026 04:35 (54)
Complete: 🔍
Cache ID: 216::103

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