CVE-2025-21074 is an out-of-bounds read vulnerability classified under CWE-125 found in the libimagecodec.quram.so component of Samsung Mobile devices. This vulnerability exists in versions prior to the Samsung Monthly Release (SMR) November 2025 Release 1. The flaw allows remote attackers to cause the device to read memory outside the allocated buffer boundaries when processing specially crafted image data. This can lead to unauthorized disclosure of sensitive information residing in adjacent memory areas. The vulnerability is exploitable remotely over the network without requiring any privileges but does require user interaction, such as opening or previewing a maliciously crafted image file. The CVSS v3.1 base score is 4.3, indicating a medium severity level, with the vector AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N, meaning the attack vector is network-based, with low attack complexity, no privileges required, user interaction needed, and only confidentiality impacted. There are no known public exploits or patches available at the time of publication. The vulnerability does not affect the integrity or availability of the device but can lead to partial information disclosure. The affected component is part of the image codec library, which is commonly used in image processing and rendering on Samsung Mobile devices, making this vulnerability relevant to a broad range of users. The flaw was reserved in November 2024 and published in November 2025, indicating a year-long development and disclosure timeline.

For European organizations, the primary impact of CVE-2025-21074 is the potential leakage of sensitive information from Samsung Mobile devices. This could include personal or corporate data stored in memory adjacent to the out-of-bounds read area. While the vulnerability does not allow code execution or denial of service, the confidentiality breach could facilitate further targeted attacks or espionage, especially in sectors handling sensitive or regulated data such as finance, government, and healthcare. The requirement for user interaction means phishing or social engineering could be used to deliver the malicious payload. Given the widespread use of Samsung Mobile devices in Europe, especially in business environments, this vulnerability could be leveraged to compromise mobile endpoints, which are often less controlled than traditional desktops. The absence of known exploits reduces immediate risk but also underscores the importance of proactive mitigation. Failure to address this vulnerability could lead to compliance issues under GDPR if personal data is exposed. Overall, the impact is moderate but significant enough to warrant timely attention.

1. Monitor Samsung’s official security advisories and apply the SMR November 2025 Release 1 update or later as soon as it becomes available to ensure the vulnerability is patched. 2. Implement mobile device management (MDM) policies to restrict installation and opening of untrusted or unsolicited image files, especially from unknown sources. 3. Educate users on the risks of opening images from unverified senders to reduce the likelihood of successful social engineering attacks. 4. Employ network-level protections such as email filtering and attachment scanning to block potentially malicious image files before reaching end users. 5. Use endpoint security solutions capable of detecting anomalous behavior related to image processing libraries. 6. For high-risk environments, consider disabling automatic image previews in messaging and email applications to prevent inadvertent triggering of the vulnerability. 7. Conduct regular security audits of mobile devices and ensure sensitive data is encrypted and access-controlled to minimize exposure in case of information leakage. 8. Coordinate with Samsung support channels for any interim mitigation advice or hotfixes prior to official patch release.