EUVD-2026-19564Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (MediaTek) · only source for this CVE.
CVSS VectorVendor: MediaTek
Lifecycle Timeline
3DescriptionCVE.org
In Modem, there is a possible system crash due to a logic error. 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: MOLY01106496; Issue ID: MSV-4467.
AnalysisAI
Remote denial of service in MediaTek modem chipsets allows unauthenticated attackers to crash the system via a logic error when connecting to a rogue base station. The vulnerability affects 19 MediaTek chipset models (MT8678, MT6899, MT6897, and others) with no authentication or user interaction required. EPSS score of 0.08% (24th percentile) and CISA SSVC framework rating of no confirmed exploitation and partial technical impact suggest this is a low real-world priority despite the moderate CVSS 6.5 score.
Technical ContextAI
The vulnerability resides in MediaTek modem firmware and is triggered by improper handling of malformed or adversarial radio signals from a rogue base station. The root cause is classified as CWE-770 (Allocation of Resources Without Limits or Throttling), indicating the modem fails to properly validate or rate-limit certain base station communications, causing resource exhaustion or uncontrolled memory allocation that leads to system crash. This affects the LTE/5G radio stack in SoCs used in mobile devices, where the modem firmware runs in a separate execution context from the application processor. The attack surface is the air interface (AV:A per CVSS), requiring the attacker to operate a rogue base station or simulate cellular network signals within proximity of the target device.
RemediationAI
MediaTek has released a firmware patch identified as MOLY01106496 addressing the logic error in modem base station signal handling. Device manufacturers using affected chipsets should apply this patch through their firmware release process and distribute updates to end users. End users should apply modem firmware updates when made available by their device manufacturer. No workaround is available to mitigate the vulnerability without firmware patching, as the flaw resides in the modem firmware layer below operating system controls. Additional details are available in MediaTek's security advisory at https://corp.mediatek.com/product-security-bulletin/April-2026.
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External POC / Exploit Code
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