CVE-2026-20459

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: MOLY01816800; Issue ID: MSV-6842.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://corp.mediatek.com/product-security-bulletin/July-2026

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-01 04:17

Updated : 2026-07-01 18:16

NVD link : CVE-2026-20459

Mitre link : CVE-2026-20459

CVE.ORG link : CVE-2026-20459

JSON object : View

Products Affected

No product.

CWE

CWE-288

Authentication Bypass Using an Alternate Path or Channel

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[{"status": "affected", "version": "MT2716"}, {"status": "affected", "version": "MT2735"}, {"status": "affected", "version": "MT2737"}, {"status": "affected", "version": "MT6739"}, {"status": "affected", "version": "MT6761"}, {"status": "affected", "version": "MT6762"}, {"status": "affected", "version": "MT6763"}, {"status": "affected", "version": "MT6765"}, {"status": "affected", "version": "MT6767"}, {"status": "affected", "version": "MT6768"}, {"status": "affected", "version": "MT6769"}, {"status": "affected", "version": "MT6771"}, {"status": "affected", "version": "MT6779"}, {"status": "affected", "version": "MT6781"}, {"status": "affected", "version": "MT6783"}, {"status": "affected", "version": "MT6785"}, {"status": "affected", "version": "MT6789"}, {"status": "affected", "version": "MT6813"}, {"status": "affected", "version": "MT6833"}, {"status": "affected", "version": "MT6835"}, {"status": "affected", "version": "MT6853"}, {"status": "affected", "version": "MT6855"}, {"status": "affected", "version": "MT6858"}, {"status": "affected", "version": "MT6873"}, {"status": "affected", "version": "MT6875"}, {"status": "affected", "version": "MT6877"}, {"status": "affected", "version": "MT6878"}, {"status": "affected", "version": "MT6879"}, {"status": "affected", "version": "MT6880"}, {"status": "affected", "version": "MT6881"}, {"status": "affected", "version": "MT6883"}, {"status": "affected", "version": "MT6885"}, {"status": "affected", "version": "MT6886"}, {"status": "affected", "version": "MT6889"}, {"status": "affected", "version": "MT6890"}, {"status": "affected", "version": "MT6891"}, {"status": "affected", "version": "MT6893"}, {"status": "affected", "version": "MT6895"}, {"status": "affected", "version": "MT6896"}, {"status": "affected", "version": "MT6897"}, {"status": "affected", "version": "MT6899"}, {"status": "affected", "version": "MT6980"}, {"status": "affected", "version": "MT6982"}, {"status": "affected", "version": "MT6983"}, {"status": "affected", "version": "MT6985"}, {"status": "affected", "version": "MT6986"}, {"status": "affected", "version": "MT6986D"}, {"status": "affected", "version": "MT6988"}, {"status": "affected", "version": "MT6989"}, {"status": "affected", "version": "MT6990"}, {"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8666"}, {"status": "affected", "version": "MT8667"}, {"status": "affected", "version": "MT8668"}, {"status": "affected", "version": "MT8673"}, {"status": "affected", "version": "MT8675"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8755"}, {"status": "affected", "version": "MT8765"}, {"status": "affected", "version": "MT8766"}, {"status": "affected", "version": "MT8766R"}, {"status": "affected", "version": "MT8768"}, {"status": "affected", "version": "MT8771"}, {"status": "affected", "version": "MT8775"}, {"status": "affected", "version": "MT8781"}, {"status": "affected", "version": "MT8786"}, {"status": "affected", "version": "MT8788"}, {"status": "affected", "version": "MT8788E"}, {"status": "affected", "version": "MT8789"}, {"status": "affected", "version": "MT8791"}, {"status": "affected", "version": "MT8791T"}, {"status": "affected", "version": "MT8792"}, {"status": "affected", "version": "MT8793"}, {"status": "affected", "version": "MT8795T"}, {"status": "affected", "version": "MT8796"}, {"status": "affected", "version": "MT8797"}, {"status": "affected", "version": "MT8798"}, {"status": "affected", "version": "MT8863"}, {"status": "affected", "version": "MT8873"}, {"status": "affected", "version": "MT8883"}, {"status": "affected", "version": "MT8893"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-01T04:17:14.247", "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/July-2026", "source": "security@mediatek.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security@mediatek.com", "description": [{"lang": "en", "value": "CWE-288"}]}], "descriptions": [{"lang": "en", "value": "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: MOLY01816800; Issue ID: MSV-6842."}], "lastModified": "2026-07-01T18:16:00.957", "sourceIdentifier": "security@mediatek.com"}