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CVE-2026-20449

Buffer overflow in Mediatek Mt6763 Firmware

CVSS score

6.5

EPSS probability

%0.2

Risk score

0.0

Published

5 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-2026-20449 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 heap buffer overflow. 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: MOLY01760138; Issue ID: MSV-6148.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-20449 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1mediatekmt6763 firmware View
2mediatekmt6763 View
3mediatekmt6765 firmware View
4mediatekmt6765 View
5mediatekmt6767 firmware View
6mediatekmt6767 View
7mediatekmt6768 firmware View
8mediatekmt6768 View
9mediatekmt6769 firmware View
10mediatekmt6769 View
11mediatekmt6771 firmware View
12mediatekmt6771 View
13mediatekmt6779 firmware View
14mediatekmt6779 View
15mediatekmt6781 firmware View
16mediatekmt6781 View
17mediatekmt6783 firmware View
18mediatekmt6783 View
19mediatekmt6785 firmware View
20mediatekmt6785 View
21mediatekmt6789 firmware View
22mediatekmt6789 View
23mediatekmt6813 firmware View
24mediatekmt6813 View
25mediatekmt6815 firmware View
26mediatekmt6815 View
27mediatekmt6833 firmware View
28mediatekmt6833 View
29mediatekmt6835 firmware View
30mediatekmt6835 View
31mediatekmt6853 firmware View
32mediatekmt6853 View
33mediatekmt6855 firmware View
34mediatekmt6855 View
35mediatekmt6858 firmware View
36mediatekmt6858 View
37mediatekmt6873 firmware View
38mediatekmt6873 View
39mediatekmt6875 firmware View
40mediatekmt6875 View
41mediatekmt6877 firmware View
42mediatekmt6877 View
43mediatekmt6878 firmware View
44mediatekmt6878 View
45mediatekmt6879 firmware View
46mediatekmt6879 View
47mediatekmt6880 firmware View
48mediatekmt6880 View
49mediatekmt6883 firmware View
50mediatekmt6883 View
51mediatekmt6885 firmware View
52mediatekmt6885 View
53mediatekmt6886 firmware View
54mediatekmt6886 View
55mediatekmt6889 firmware View
56mediatekmt6889 View
57mediatekmt6890 firmware View
58mediatekmt6890 View
59mediatekmt6891 firmware View
60mediatekmt6891 View
61mediatekmt6893 firmware View
62mediatekmt6893 View
63mediatekmt6895 firmware View
64mediatekmt6895 View
65mediatekmt6896 firmware View
66mediatekmt6896 View
67mediatekmt6897 firmware View
68mediatekmt6897 View
69mediatekmt6899 firmware View
70mediatekmt6899 View
71mediatekmt6980 firmware View
72mediatekmt6980 View
73mediatekmt6983 firmware View
74mediatekmt6983 View
75mediatekmt6985 firmware View
76mediatekmt6985 View
77mediatekmt6986d firmware View
78mediatekmt6986d View
79mediatekmt6988 firmware View
80mediatekmt6988 View
81mediatekmt2735 firmware View
82mediatekmt2735 View
83mediatekmt2737 firmware View
84mediatekmt2737 View
85mediatekmt6739 firmware View
86mediatekmt6739 View
87mediatekmt6761 firmware View
88mediatekmt6761 View
89mediatekmt6762 firmware View
90mediatekmt6762 View
91mediatekmt6989 firmware View
92mediatekmt6989 View
93mediatekmt6990 firmware View
94mediatekmt6990 View
95mediatekmt6991 firmware View
96mediatekmt6991 View
97mediatekmt6993 firmware View
98mediatekmt6993 View
99mediatekmt8668 firmware View
100mediatekmt8668 View
101mediatekmt8673 firmware View
102mediatekmt8673 View
103mediatekmt8675 firmware View
104mediatekmt8675 View
105mediatekmt8676 firmware View
106mediatekmt8676 View
107mediatekmt8678 firmware View
108mediatekmt8678 View
109mediatekmt8755 firmware View
110mediatekmt8755 View
111mediatekmt8771 firmware View
112mediatekmt8771 View
113mediatekmt8775 firmware View
114mediatekmt8775 View
115mediatekmt8791 firmware View
116mediatekmt8791 View
117mediatekmt8791t firmware View
118mediatekmt8791t View
119mediatekmt8792 firmware View
120mediatekmt8792 View
121mediatekmt8793 firmware View
122mediatekmt8793 View
123mediatekmt8795t firmware View
124mediatekmt8795t View
125mediatekmt8797 firmware View
126mediatekmt8797 View
127mediatekmt8798 firmware View
128mediatekmt8798 View
129mediatekmt8863 firmware View
130mediatekmt8863 View
131mediatekmt8873 firmware View
132mediatekmt8873 View
133mediatekmt8883 firmware View
134mediatekmt8883 View
135mediatekmt8893 firmware View
136mediatekmt8893 View
Total affected vendors: 1|Products: 136

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-2026-20449 is associated with the following CWEs:

CWE-120: Common Weakness Enumeration Entry CWE-120

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-2026-20449 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/May-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-120

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CVE-2026-20449 · Buffer overflow in Mediatek Mt6763 Firmware