Medium severity · published May 4, 2026
CVE-2026-20449
In Modem, there is a possible system crash due to a heap buffer overflow
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT2735; MT2737; MT6739; MT6761; MT6762; MT6763; +34 more · source: vendor
MF
Mt2735 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt2737 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6739 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6761 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6762 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6763 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6765 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6767 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6768 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6769 Firmware · Mediatek
All versions, or not specified · source: NVD
MF
Mt6771 Firmware · Mediatek
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20449
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20449
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/May-2026
More from MediaTek chipset
8.8
CVE-2026-20586
In vdec, there is a possible out of bounds write due to a missing bounds check
8.8
CVE-2026-20433
In Modem, there is a possible out of bounds write due to a missing bounds check
8.4
CVE-2026-20531
In apu, there is a possible memory corruption due to use after free
8.4
CVE-2026-20524
In apu, there is a possible memory corruption due to improper input validation
8.4
CVE-2026-20523
In neuropilot, there is a possible out of bounds write due to a missing bounds check