MediaTek MT6897/MT6989 imgsys 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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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in MediaTek MT6897 and MT6989. It has been classified as critical. Affected is an unknown function of the component imgsys. This manipulation causes out-of-bounds write. This vulnerability is registered as CVE-2026-20409. The attack needs to be launched locally. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability has been found in MediaTek MT6897 and MT6989 (unknown version) and classified as critical. Affected by this vulnerability is an unknown code block of the component imgsys. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In imgsys, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10363246; Issue ID: MSV-5779.

The advisory is shared at corp.mediatek.com. This vulnerability is known as CVE-2026-20409 since 11/03/2025. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Applying the patch ALPS10363246 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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

EPSS Score: 🔒
EPSS Percentile: 🔒

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: ALPS10363246

Timelineinfo

11/03/2025 CVE reserved
02/02/2026 +91 days Advisory disclosed
02/02/2026 +0 days VulDB entry created
02/04/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: MSV-5779
Status: Confirmed

CVE: CVE-2026-20409 (🔒)
GCVE (CVE): GCVE-0-2026-20409
GCVE (VulDB): GCVE-100-343705

Entryinfo

Created: 02/02/2026 10:21
Updated: 02/04/2026 16:34
Changes: 02/02/2026 10:21 (56), 02/04/2026 16:34 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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