CVE-2025-20807 is a medium-severity integer overflow vulnerability classified under CWE-190, found in MediaTek's MT6899, MT6991, and MT8793 chipsets running Android 16.0. The vulnerability resides in the dpe component, where an integer overflow can cause an out-of-bounds write operation. This memory corruption flaw can be leveraged by an attacker who already possesses System-level privileges to escalate their privileges further locally. The flaw does not require user interaction, making it easier to exploit once initial access is obtained. The CVSS 3.1 vector (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) indicates that the attack requires local access with high privileges but has low attack complexity and no user interaction. The impact includes full compromise of confidentiality, integrity, and availability of the affected system. Although no public exploits are known, the vulnerability poses a significant risk in environments where attackers have gained System privileges. The patch identified as ALPS10114841 is available but not linked in the provided data. The issue was reserved in November 2024 and published in January 2026, indicating a recent disclosure. MediaTek chipsets MT6899, MT6991, and MT8793 are commonly used in various Android devices, making this vulnerability relevant to mobile device security.

The primary impact of CVE-2025-20807 is local privilege escalation on devices using affected MediaTek chipsets running Android 16.0. An attacker with System privileges can exploit the integer overflow to perform out-of-bounds writes, potentially leading to arbitrary code execution or system compromise. This can result in full control over the device, allowing unauthorized access to sensitive data, modification or deletion of critical system files, and disruption of device availability. For organizations, this vulnerability could facilitate lateral movement within networks if attackers compromise mobile devices used for corporate access. The lack of user interaction requirement increases the risk in environments where attackers have already gained elevated privileges. Although exploitation requires prior System-level access, the vulnerability can be a critical step in a multi-stage attack chain. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as patches are not yet widely deployed.

Organizations and users should prioritize applying the official patch ALPS10114841 from MediaTek or device manufacturers as soon as it becomes available. Until patched, restrict local access to devices running affected MediaTek chipsets to trusted users only, minimizing the risk of attackers obtaining System privileges. Employ strict access controls and monitoring on devices to detect suspicious activities indicative of privilege escalation attempts. Use mobile device management (MDM) solutions to enforce security policies and ensure timely updates. Additionally, conduct regular security audits and vulnerability assessments on mobile devices to identify and remediate potential exploitation paths. Developers should review and harden code handling integer operations to prevent similar overflows. Network segmentation and endpoint protection can help contain potential compromises stemming from exploited devices. Finally, educate users about the risks of granting elevated privileges to untrusted applications or users.