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CVE-2026-20450

In Modem, there is a possible system crash due to incorrect error handling. This could lead to remote denial of service,

In Modem, there is a possible system crash due to incorrect error handling. 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: MOLY01753620.

Issue ID: MSV-6100.

MEDIUM · CVSS 6.5 EPSS 0.00023
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
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Weakness Classification

CWE-617Reachable Assertion
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Affected Products & Versions

51
mediatek mt2735 firmwareall versions
mediatek mt2737 firmwareall versions
mediatek mt6833 firmwareall versions
mediatek mt6835 firmwareall versions
mediatek mt6853 firmwareall versions
mediatek mt6855 firmwareall versions
mediatek mt6858 firmwareall versions
mediatek mt6873 firmwareall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@mediatek.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 May 2026 · 07:15 AM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://corp.mediatek.com/product-security-bulletin/May-2026Vendor Advisory
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