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CVE-2026-20404

Quick assessment

Affected
MediaTek, Inc. MediaTek chipset
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MediaTek Chipsets是中国联发科（MediaTek）公司的一系列芯片。 MediaTek Chipsets存在安全漏洞，该漏洞源于组件Modem输入验证不当，可能导致远程拒绝服务攻击。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.50% · P40
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I. Basic Information for CVE-2026-20404

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Modem, there is a possible system crash due to improper input validation. 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: MOLY01689248; Issue ID: MSV-4837.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
MediaTek Chipsets 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MediaTek Chipsets是中国联发科（MediaTek）公司的一系列芯片。 MediaTek Chipsets存在安全漏洞，该漏洞源于组件Modem输入验证不当，可能导致远程拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MediaTek, Inc. MediaTek chipset MT2735 -

II. Public POCs for CVE-2026-20404

# POC Description Source Link Shenlong Link
1 A MediaTek modem input validation issue can cause a system crash (remote DoS) when a UE connects to a rogue base station controlled by an attacker with no user interaction required. https://github.com/George0Papasotiriou/CVE-2026-20404-MediaTek-modem-remote-DoS-rogue-base-station-scenario- POC Details
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No public POC found.

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III. Intelligence Information for CVE-2026-20404

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Vendor Advisories for CVE-2026-20404 (1)

Same Patch Batch · MediaTek, Inc. · 2026-02-02 · 21 CVEs total

CVE-2026-20409 MediaTek Chipsets 安全漏洞
CVE-2026-20419 MediaTek Chipsets 安全漏洞
CVE-2026-20418 MediaTek Chipsets 安全漏洞
CVE-2026-20417 MediaTek Chipsets 安全漏洞
CVE-2026-20415 MediaTek Chipsets 安全漏洞
CVE-2026-20414 MediaTek Chipsets 安全漏洞
CVE-2026-20413 MediaTek Chipsets 安全漏洞
CVE-2026-20412 MediaTek Chipsets 安全漏洞
CVE-2026-20411 MediaTek Chipsets 安全漏洞
CVE-2026-20410 MediaTek Chipsets 安全漏洞
CVE-2026-20420 MediaTek Chipsets 安全漏洞
CVE-2026-20408 MediaTek Chipsets 安全漏洞
CVE-2026-20407 MediaTek Chipsets 安全漏洞
CVE-2026-20406 MediaTek Chipsets 安全漏洞
CVE-2026-20405 MediaTek Chipsets 安全漏洞
CVE-2026-20403 MediaTek Chipsets 安全漏洞
CVE-2026-20422 MediaTek Chipsets 安全漏洞
CVE-2026-20421 MediaTek Chipsets 安全漏洞
CVE-2026-20402 MediaTek Chipsets 安全漏洞
CVE-2026-20401 MediaTek Chipsets 安全漏洞

IV. Related Vulnerabilities

Same product: MediaTek chipset
Same vendor: MediaTek, Inc.
Same weakness: CWE-787

V. Comments for CVE-2026-20404

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