CVE-2026-20433 — Out-of-bounds Write in INC Mediatek Chipset

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
8.8HIGHNVD
EPSS
0.1%
top 80.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Mediatek INC Mediatek Chipset
Timeline
PublishedApr 7

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 needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages1 packages

▶CVEListV5mediatek_inc/mediatek_chipset62 versions+61

🔴Vulnerability Details

2
GHSA
GHSA-5h6h-2wjp-jc72: In Modem, there is a possible out of bounds write due to a missing bounds check↗2026-04-07
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CVEList
CVE-2026-20433: In Modem, there is a possible out of bounds write due to a missing bounds check↗2026-04-07
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CVE-2026-20433 — Out-of-bounds Write | cvebase