CVE-2025-61826 is an integer underflow vulnerability classified under CWE-191 affecting Adobe Illustrator on iPad versions 3.0.9 and earlier. An integer underflow occurs when an arithmetic operation attempts to create a numeric value smaller than the minimum representable value, causing wraparound behavior that can lead to memory corruption. In this case, the vulnerability can be triggered when a user opens a maliciously crafted Illustrator file, causing the application to mishandle internal calculations related to file processing. This mishandling can corrupt memory in a way that allows an attacker to execute arbitrary code within the context of the current user. The vulnerability requires user interaction (opening the malicious file) but does not require any prior authentication or elevated privileges. The CVSS 3.1 score of 7.8 reflects high severity due to the potential for full compromise of the user environment, impacting confidentiality, integrity, and availability. Although no exploits are currently known in the wild, the vulnerability's nature and impact make it a significant threat, especially for users in creative industries relying on Illustrator on iPad. The lack of an available patch at the time of reporting increases the urgency for interim mitigations. The vulnerability is particularly relevant for environments where untrusted files might be received or shared, such as collaborative design workflows.

For European organizations, this vulnerability poses a significant risk to confidentiality, integrity, and availability of data and systems used in creative workflows. Successful exploitation could allow attackers to execute arbitrary code, potentially leading to data theft, insertion of malicious payloads, or disruption of design projects. Organizations in sectors such as advertising, media, publishing, and digital design that rely on Adobe Illustrator on iPad are at heightened risk. The requirement for user interaction means phishing or social engineering could be used to deliver the malicious file, increasing the attack surface. Given the widespread use of Apple devices in Europe and the growing adoption of iPad-based creative tools, the vulnerability could affect a broad range of users. Additionally, compromised devices could serve as entry points for lateral movement within corporate networks, especially if the iPad is connected to enterprise resources. The lack of known exploits in the wild currently limits immediate widespread impact, but the high severity score and potential for arbitrary code execution necessitate proactive defense measures.

1. Immediately educate users about the risks of opening files from untrusted or unknown sources, emphasizing caution with Illustrator files received via email or messaging platforms. 2. Implement strict file validation and scanning policies for all incoming Illustrator files, using advanced malware detection tools capable of analyzing file contents beyond signature-based detection. 3. Restrict the use of Illustrator on iPad to trusted networks and environments where possible, limiting exposure to potentially malicious files. 4. Monitor device and network activity for unusual behavior indicative of exploitation attempts, such as unexpected process launches or network connections originating from iPads running Illustrator. 5. Enforce the principle of least privilege on iPad devices, ensuring users operate with minimal necessary permissions to reduce the impact of potential code execution. 6. Stay informed about Adobe’s patch releases and apply updates promptly once a fix is available. 7. Consider deploying mobile device management (MDM) solutions to enforce security policies, control app usage, and remotely respond to incidents involving iPads. 8. Where feasible, isolate iPad devices used for sensitive design work from critical enterprise systems to contain potential compromises.