Back to the CVE list
CVE-2026-20586

Out-of-bounds write in MediaTek, Inc. MediaTek Chipset

CVSS score

8.8

EPSS probability

%0.4

Risk score

0.0

Published

7 d ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2026-20586 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20586 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1MediaTek, Inc.MediaTek chipset View
2mediatekmt8910 firmware View
3mediatekmt8910 View
4mediatekmt2718 firmware View
5mediatekmt2718 View
6mediatekmt6768 firmware View
7mediatekmt6768 View
8mediatekmt6789 firmware View
9mediatekmt6789 View
10mediatekmt6769 firmware View
11mediatekmt6769 View
12mediatekmt6833 firmware View
13mediatekmt6833 View
14mediatekmt6855 firmware View
15mediatekmt6855 View
16mediatekmt6877 firmware View
17mediatekmt6877 View
18mediatekmt8186 firmware View
19mediatekmt8186 View
20mediatekmt8188 firmware View
21mediatekmt8188 View
22mediatekmt8189 firmware View
23mediatekmt8189 View
24mediatekmt8195 firmware View
25mediatekmt8195 View
26mediatekmt8196 firmware View
27mediatekmt8196 View
28mediatekmt8367 firmware View
29mediatekmt8367 View
30mediatekmt8391 firmware View
31mediatekmt8391 View
32mediatekmt8395 firmware View
33mediatekmt8395 View
34mediatekmt8668 firmware View
35mediatekmt8668 View
36mediatekmt8676 firmware View
37mediatekmt8676 View
38mediatekmt8678 firmware View
39mediatekmt8678 View
40mediatekmt8696 firmware View
41mediatekmt8696 View
42mediatekmt8781 firmware View
43mediatekmt8781 View
44mediatekmt8788e firmware View
45mediatekmt8788e View
46mediatekmt8792 firmware View
47mediatekmt8792 View
48mediatekmt8793 firmware View
49mediatekmt8793 View
50mediatekmt8799 firmware View
51mediatekmt8799 View
Total affected vendors: 2|Products: 51

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.8CVSS V31HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HNVD
8.8CVSS V3_1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE ADP

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20586 is associated with the following CWEs:

CWE-787: Out-of-bounds Write

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20586 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

https://www.mediatek.com/product-security-bulletin/October-2026vendor-advisory

CVSS Vector Radar Chart

8.8 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityHighAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)High
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

MI
MediaTek, Inc. logo
MediaTek, Inc.
M
mediatek logo
mediatek

Weakness Type (CWE & CAPEC)

CWE-787

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-20586"
CVE-2026-20586 · Out-of-bounds write in MediaTek, Inc. MediaTek Chipset · DayBreach