EUVD-2026-40870
GHSA-r5cc-gr9f-ch8c
Severity by source
AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Adjacent vector and high complexity reflect mandatory rogue base station infrastructure; PR:N and UI:N confirmed by description; availability-only impact matches DoS-only null pointer dereference with no scope change.
Primary rating from Vendor (MediaTek).
CVSS VectorVendor: MediaTek
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
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: MOLY01826924; Issue ID: MSV-7301.
AnalysisAI
Remote denial of service in the MediaTek Modem firmware component affects approximately 60 chipset models via a null pointer dereference triggered when a target device connects to a rogue cellular base station. An attacker controlling a fake eNodeB or gNodeB can transmit crafted modem protocol messages that cause improper input validation to fail, crashing the modem and stripping affected devices of cellular connectivity. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two explicit conditions stated in the CVE description: first, the target UE must have connected to a rogue base station controlled by the attacker - this is the essential enabling condition, as the attack is only deliverable through the cellular radio interface, not over IP networks or the internet. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.3 Medium score is consistent with the actual threat profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker deploys a rogue LTE or 5G base station - using commercially available software-defined radio hardware combined with open-source base station software - in proximity to a target location such as a conference venue, government building, or residence. Nearby devices containing affected MediaTek chipsets automatically associate with the rogue cell due to signal strength. … |
| Remediation | The primary remediation is to apply the vendor-released patch identified as Patch ID MOLY01826924 (Issue ID MSV-7301), distributed through MediaTek's July 2026 Product Security Bulletin at https://corp.mediatek.com/product-security-bulletin/July-2026. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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