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CVE-2026-20540

Vulnerability in MediaTek, Inc. MediaTek Chipset

CVSS score

5.3

EPSS probability

%0.2

Risk score

0.0

Published

8 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

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-20540 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 out of bounds read due to a missing bounds check. 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: MOLY01774038; Issue ID: MSV-8912.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20540 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1MediaTek, Inc.MediaTek chipset View
2mediatekmt2716 firmware View
3mediatekmt2716 View
4mediatekmt2735 firmware View
5mediatekmt2735 View
6mediatekmt2737 firmware View
7mediatekmt2737 View
8mediatekmt6739 firmware View
9mediatekmt6739 View
10mediatekmt6761 firmware View
11mediatekmt6761 View
12mediatekmt6762 firmware View
13mediatekmt6762 View
14mediatekmt6763 firmware View
15mediatekmt6763 View
16mediatekmt6765 firmware View
17mediatekmt6765 View
18mediatekmt6767 firmware View
19mediatekmt6767 View
20mediatekmt6768 firmware View
21mediatekmt6768 View
22mediatekmt6769 firmware View
23mediatekmt6769 View
24mediatekmt6771 firmware View
25mediatekmt6771 View
26mediatekmt6779 firmware View
27mediatekmt6779 View
28mediatekmt6781 firmware View
29mediatekmt6781 View
30mediatekmt6783 firmware View
31mediatekmt6783 View
32mediatekmt6785 firmware View
33mediatekmt6785 View
34mediatekmt6789 firmware View
35mediatekmt6789 View
36mediatekmt6813 firmware View
37mediatekmt6813 View
38mediatekmt6815 firmware View
39mediatekmt6815 View
40mediatekmt6833 firmware View
41mediatekmt6833 View
42mediatekmt6835 firmware View
43mediatekmt6835 View
44mediatekmt6853 firmware View
45mediatekmt6853 View
46mediatekmt6855 firmware View
47mediatekmt6855 View
48mediatekmt6858 firmware View
49mediatekmt6858 View
50mediatekmt6873 firmware View
51mediatekmt6873 View
52mediatekmt6875 firmware View
53mediatekmt6875 View
54mediatekmt6877 firmware View
55mediatekmt6877 View
56mediatekmt6878 firmware View
57mediatekmt6878 View
58mediatekmt6879 firmware View
59mediatekmt6879 View
60mediatekmt6880 firmware View
61mediatekmt6880 View
62mediatekmt6881 firmware View
63mediatekmt6881 View
64mediatekmt6883 firmware View
65mediatekmt6883 View
66mediatekmt6885 firmware View
67mediatekmt6885 View
68mediatekmt6886 firmware View
69mediatekmt6886 View
70mediatekmt6889 firmware View
71mediatekmt6889 View
72mediatekmt6890 firmware View
73mediatekmt6890 View
74mediatekmt6891 firmware View
75mediatekmt6891 View
76mediatekmt6893 firmware View
77mediatekmt6893 View
78mediatekmt6895 firmware View
79mediatekmt6895 View
80mediatekmt6896 firmware View
81mediatekmt6896 View
82mediatekmt6897 firmware View
83mediatekmt6897 View
84mediatekmt6899 firmware View
85mediatekmt6899 View
86mediatekmt6980 firmware View
87mediatekmt6980 View
88mediatekmt6982 firmware View
89mediatekmt6982 View
90mediatekmt6983 firmware View
91mediatekmt6983 View
92mediatekmt6985 firmware View
93mediatekmt6985 View
94mediatekmt6986 firmware View
95mediatekmt6986 View
96mediatekmt6988 firmware View
97mediatekmt6988 View
98mediatekmt6989 firmware View
99mediatekmt6989 View
100mediatekmt6990 firmware View
101mediatekmt6990 View
102mediatekmt6991 firmware View
103mediatekmt6991 View
104mediatekmt6993 firmware View
105mediatekmt6993 View
106mediatekmt8666 firmware View
107mediatekmt8666 View
108mediatekmt8667 firmware View
109mediatekmt8667 View
110mediatekmt8668 firmware View
111mediatekmt8668 View
112mediatekmt8673 firmware View
113mediatekmt8673 View
114mediatekmt8675 firmware View
115mediatekmt8675 View
116mediatekmt8676 firmware View
117mediatekmt8676 View
118mediatekmt8678 firmware View
119mediatekmt8678 View
120mediatekmt8755 firmware View
121mediatekmt8755 View
122mediatekmt8765 firmware View
123mediatekmt8765 View
124mediatekmt8766 firmware View
125mediatekmt8766 View
126mediatekmt8766r firmware View
127mediatekmt8766r View
128mediatekmt8768 firmware View
129mediatekmt8768 View
130mediatekmt8771 firmware View
131mediatekmt8771 View
132mediatekmt8775 firmware View
133mediatekmt8775 View
134mediatekmt8781 firmware View
135mediatekmt8781 View
136mediatekmt8786 firmware View
137mediatekmt8786 View
138mediatekmt8788 firmware View
139mediatekmt8788 View
140mediatekmt8788e firmware View
141mediatekmt8788e View
142mediatekmt8789 firmware View
143mediatekmt8789 View
144mediatekmt8791 firmware View
145mediatekmt8791 View
146mediatekmt8791t firmware View
147mediatekmt8791t View
148mediatekmt8792 firmware View
149mediatekmt8792 View
150mediatekmt8793 firmware View
151mediatekmt8793 View
152mediatekmt8795t firmware View
153mediatekmt8795t View
154mediatekmt8796 firmware View
155mediatekmt8796 View
156mediatekmt8797 firmware View
157mediatekmt8797 View
158mediatekmt8798 firmware View
159mediatekmt8798 View
160mediatekmt8863 firmware View
161mediatekmt8863 View
162mediatekmt8873 firmware View
163mediatekmt8873 View
164mediatekmt8883 firmware View
165mediatekmt8883 View
166mediatekmt8893 firmware View
167mediatekmt8893 View
Total affected vendors: 2|Products: 167

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
5.3CVSS V31MEDIUMCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HNVD
5.3CVSS V3_1MEDIUMCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/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-2026-20540 is associated with the following CWEs:

CWE-126: Common Weakness Enumeration Entry CWE-126

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-2026-20540 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://www.mediatek.com/product-security-bulletin/October-2026vendor-advisory

CVSS Vector Radar Chart

5.3 / 10
Attack VectorAdjacentComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorAdjacent network
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
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-126

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