CVE-2026-20520
In Modem, there is a possible out of bounds write due to a missing bounds check.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, 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: MOLY01778988; Issue ID: MSV-8897.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 13th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- mediatek/mt2716 firmware · mediatek/mt2735 firmware · mediatek/mt2737 firmware · mediatek/mt6813 firmware · mediatek/mt6815 firmware · mediatek/mt6833 firmware · mediatek/mt6835 firmware · mediatek/mt6853 firmware · mediatek/mt6855 firmware · mediatek/mt6858 firmware · mediatek/mt6873 firmware · mediatek/mt6875 firmware · mediatek/mt6877 firmware · mediatek/mt6878 firmware · mediatek/mt6879 firmware · mediatek/mt6880 firmware · mediatek/mt6881 firmware · mediatek/mt6883 firmware · mediatek/mt6885 firmware · mediatek/mt6886 firmware · +37 more
- Source
- security@mediatek.com
EPSS moved from 0.2% on 5 October 2026 to 0.2% on 26 October 2026.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.