MediaTek MT6813/MT6982VB/MT6986/MT6986D/MT6988 ccci out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in MediaTek MT6813, MT6982VB, MT6986, MT6986D and MT6988. This affects an unknown part of the component ccci. The manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2026-20490. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in MediaTek MT6813, MT6982VB, MT6986, MT6986D and MT6988 and classified as problematic. This issue affects some unknown processing of the component ccci. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In ccci, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10981501; Issue ID: MSV-7669.

It is possible to read the advisory at mediatek.com. The identification of this vulnerability is CVE-2026-20490 since 11/03/2025. The exploitation is known to be easy. Attacking locally is a requirement. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not publicly available.

Applying the patch ALPS10981501 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-2026-87551015). 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: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 4.4
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: ALPS10981501

Timelineinfo

11/03/2025 CVE reserved
08/03/2026 +272 days Advisory disclosed
08/03/2026 +0 days VulDB entry created
08/22/2026 +19 days VulDB entry last update

Sourcesinfo

Advisory: mediatek.com
Status: Confirmed

CVE: CVE-2026-20490 (🔒)
GCVE (CVE): GCVE-0-2026-20490
GCVE (VulDB): GCVE-100-385475
CNNVD: CNNVD-2026-87551015 - MediaTek Chipsets 缓冲区错误漏洞

Entryinfo

Created: 08/03/2026 05:27
Updated: 08/22/2026 20:49
Changes: 08/03/2026 05:27 (54), 08/03/2026 16:39 (6), 08/22/2026 20:49 (11)
Complete: 🔍
Cache ID: 216::103

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

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