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CVE-2026-20431

Resource allocation without limits in Mediatek Mt6813 Firmware

CVSS score

6.5

EPSS probability

%0.3

Risk score

0.0

Published

6 mo 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

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-20431 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

In Modem, there is a possible system crash due to a logic error. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01106496; Issue ID: MSV-4467.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20431 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1mediatekmt6813 firmware View
2mediatekmt6813 View
3mediatekmt6815 firmware View
4mediatekmt6815 View
5mediatekmt6835 firmware View
6mediatekmt6835 View
7mediatekmt6878 firmware View
8mediatekmt6878 View
9mediatekmt6897 firmware View
10mediatekmt6897 View
11mediatekmt6899 firmware View
12mediatekmt6899 View
13mediatekmt6986 firmware View
14mediatekmt6986 View
15mediatekmt6991 firmware View
16mediatekmt6991 View
17mediatekmt6993 firmware View
18mediatekmt6993 View
19mediatekmt8668 firmware View
20mediatekmt8668 View
21mediatekmt8676 firmware View
22mediatekmt8676 View
23mediatekmt8678 firmware View
24mediatekmt8678 View
25mediatekmt8755 firmware View
26mediatekmt8755 View
27mediatekmt8775 firmware View
28mediatekmt8775 View
29mediatekmt8792 firmware View
30mediatekmt8792 View
31mediatekmt8793 firmware View
32mediatekmt8793 View
33mediatekmt8863 firmware View
34mediatekmt8863 View
35mediatekmt8873 firmware View
36mediatekmt8873 View
37mediatekmt8883 firmware View
38mediatekmt8883 View
Total affected vendors: 1|Products: 38

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
6.5CVSS V31MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD

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-2026-20431 is associated with the following CWEs:

CWE-770: Allocation of Resources Without Limits or Throttling

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-2026-20431 weaknesses.

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

Attack Vector and Accessibility

ExposureBitişik ağ
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://corp.mediatek.com/product-security-bulletin/April-2026vendor-advisory

CVSS Vector Radar Chart

6.5 / 10
Attack VectorAdjacentComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorAdjacent network
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

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

Follow the vendor

M
mediatek logo
mediatek

Weakness Type (CWE & CAPEC)

CWE-770

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