CVE-2025-26433 in Android
Summary
by MITRE • 11/02/2026
In multiple locations, there is a possible way to trick a user into accepting a permission due to a tapjacking/overlay attack. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability described constitutes a classic interface manipulation flaw, specifically manifesting as a tapjacking or overlay attack within the application's user interface layer. In this scenario, an attacker crafts malicious UI elements that are rendered on top of legitimate application windows, effectively obscuring the original content from the end-user while capturing their touch inputs. This technique exploits the operating system's window management and z-ordering mechanisms to create a deceptive visual environment where the user believes they are interacting with trusted interface components but is instead triggering actions controlled by malicious overlays. The core technical flaw lies in the application's failure to implement robust defenses against such overlay attacks, such as using secure flags that prevent other windows from drawing over sensitive dialogs or input fields, thereby allowing external applications to intercept and manipulate user interactions without detection.
From a security architecture perspective, this vulnerability aligns with CWE-829, which refers to the inclusion of functionality from untrusted control sources, although it is more precisely categorized under interface manipulation vulnerabilities often associated with mobile operating system specific weaknesses like those found in Android's permission model or similar desktop environments where window stacking can be abused. The operational impact is significant because it facilitates a local escalation of privilege without requiring any additional execution privileges on the target system. Since the attack relies entirely on social engineering and visual deception rather than code injection or memory corruption, it bypasses traditional signature-based detection mechanisms that focus on binary exploitation techniques. An attacker who has achieved initial access through other means can leverage this flaw to trick a user into granting high-level permissions, such as accessing sensitive data, controlling device hardware, or modifying system settings, effectively gaining the same privileges as the authenticated user.
The requirement for user interaction is a critical factor in both the exploitation vector and the mitigation strategy. Because the attack depends on deceiving the human operator, it falls squarely within the MITRE ATT&CK framework under techniques related to User Execution and potentially Social Engineering, specifically those involving UI redressing or overlay attacks. This means that while the technical exploit itself may be straightforward to implement once initial access is gained, its success rate is heavily dependent on the user's vigilance and the persuasiveness of the deceptive interface presented by the attacker. Consequently, mitigating this vulnerability requires a multi-layered approach that combines technical controls with user awareness training.
To mitigate these risks, developers must enforce strict UI security policies within their applications. This includes implementing system-level flags or API calls that explicitly prevent other windows from drawing over sensitive dialogs, such as permission request prompts or authentication screens. For example, in Android development, this involves using the FLAG_SECURE flag to secure activity content against being captured by unauthorized apps and preventing screenshots or screen recordings of protected activities. Additionally, applications should validate the source of touch events where possible and avoid rendering custom overlays that could be confused with system-level UI elements. From an operational standpoint, organizations should educate users about the signs of tapjacking attacks, such as unexpected pop-ups or misaligned buttons, to reduce the likelihood of successful deception. Regular security audits focusing on interface integrity and adherence to secure coding standards for mobile and desktop applications are essential to prevent these types of privilege escalation vectors from being exploited in production environments.