SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2026-20504

In Modem, there is a possible system crash due to a missing bounds check.

MEDIUM 5.3EPSS 0.19%

Does this matter?

Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own.

Description

In Modem, there is a possible system crash 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: MOLY00755024; Issue ID: MSV-7865.

CVSS 3.1
5.3 MEDIUMCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.19% probability · 9th percentile
CISA KEV
Not listed
Weakness
CWE-617
Affected
mediatek/mt2735 firmware · mediatek/mt6833 firmware · mediatek/mt6853 firmware · mediatek/mt6855 firmware · mediatek/mt6873 firmware · mediatek/mt6875 firmware · mediatek/mt6877 firmware · mediatek/mt6880 firmware · mediatek/mt6883 firmware · mediatek/mt6885 firmware · mediatek/mt6889 firmware · mediatek/mt6890 firmware · mediatek/mt6891 firmware · mediatek/mt6893 firmware · mediatek/mt8675 firmware · mediatek/mt8771 firmware · mediatek/mt8791 firmware · mediatek/mt8791t firmware · mediatek/mt8797 firmware
Source
security@mediatek.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.