EUVD-2026-40873
GHSA-7cqg-gq5x-qr9q
Severity by source
AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:A and AC:H reflect mandatory rogue base station proximity; C:H for meaningful modem-layer data leakage; I:N and A:N as no write or availability impact occurs.
Primary rating from Vendor (MediaTek).
CVSS VectorVendor: MediaTek
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
In Modem, there is a possible information disclosure due to improper input validation. This could lead to remote information disclosure, 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: MOLY01811421; Issue ID: MSV-6788.
AnalysisAI
Information disclosure in MediaTek modem firmware across 67+ chipset models enables a network-adjacent attacker operating a rogue cellular base station to extract sensitive data from a victim's User Equipment (UE) without any privileges or user interaction. The root cause is improper input validation (CWE-288) in the modem baseband stack, allowing a fake cell tower to elicit confidential data from connected devices. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to physically operate a rogue cellular base station (fake eNodeB or gNB) within radio range of the target UE - this is the AV:A (Adjacent Network) constraint in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.3 Medium score reflects a careful balance of constraining factors: AV:A (Adjacent Network) requires the attacker to operate a rogue base station in physical proximity to the victim, and AC:H (High Complexity) acknowledges the non-trivial operational requirements of deploying a fake cell tower. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker deploys a portable rogue base station (software-defined radio with fake eNodeB/gNB software) in a location where the target's device is likely to be, such as a conference, border crossing, or government building. The victim's device passively connects to the rogue tower as part of normal cellular association without user awareness. … |
| Remediation | The primary remediation is applying patch MOLY01811421 released by MediaTek, as referenced in the July 2026 Product Security Bulletin (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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