CVE-2026-20434 — Out-of-bounds Write in INC Mediatek Chipset

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
7.5HIGHNVD
EPSS
0.1%
top 78.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Mediatek INC Mediatek Chipset
Timeline
PublishedMar 2

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: MOLY00782946; Issue ID: MSV-4135.

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 1.6 | Impact: 5.9

Affected Packages1 packages

▶CVEListV5mediatek_inc/mediatek_chipset94 versions+93

🔴Vulnerability Details

2
GHSA
GHSA-q532-r27c-r7m9: In Modem, there is a possible out of bounds write due to a missing bounds check↗2026-03-02
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CVEList
CVE-2026-20434: In Modem, there is a possible out of bounds write due to a missing bounds check↗2026-03-02
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CVE-2026-20434 — Out-of-bounds Write | cvebase