CVE-2025-21075 is an out-of-bounds write vulnerability classified under CWE-787 found in the libimagecodec.quram.so library component of Samsung Mobile Devices. This vulnerability exists in versions prior to the November 2025 Security Maintenance Release (SMR) 1. The flaw allows remote attackers to write data outside the allocated memory bounds by exploiting improper bounds checking during image codec processing. The vulnerability can be triggered remotely without requiring any privileges (AV:N/PR:N), but it requires user interaction (UI:R), such as opening or processing a crafted image file. The vulnerability impacts the integrity of the device by potentially corrupting memory, which could lead to unpredictable behavior or code execution in some scenarios, although no direct confidentiality or availability impact is indicated. The CVSS v3.1 base score is 4.3, reflecting a medium severity level, primarily due to the lack of privilege requirements but the need for user interaction and limited impact scope. No known exploits have been reported in the wild at the time of publication. Samsung has reserved this CVE since November 2024 and is expected to address it in the November 2025 SMR update. The vulnerability affects a broad range of Samsung Mobile Devices, which are widely used globally, including Europe. The libimagecodec.quram.so component is responsible for image decoding, making this vulnerability exploitable via maliciously crafted image files delivered through messaging apps, email, or web content. Attackers could leverage this flaw to corrupt memory and potentially escalate privileges or execute arbitrary code if combined with other vulnerabilities or conditions.

For European organizations, the primary impact of CVE-2025-21075 lies in the potential compromise of device integrity on Samsung Mobile Devices used by employees. While the vulnerability does not directly affect confidentiality or availability, memory corruption could lead to application crashes or unpredictable device behavior, disrupting business operations. In worst-case scenarios, if chained with other vulnerabilities, it could enable remote code execution, posing a significant security risk. Given the widespread adoption of Samsung smartphones and tablets across Europe, especially in corporate environments where mobile devices are integral to daily operations, this vulnerability could be exploited to target employees via malicious media files. This could facilitate espionage, data tampering, or lateral movement within corporate networks. The requirement for user interaction means social engineering or phishing campaigns could be effective attack vectors. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits post-disclosure. Therefore, European organizations must consider this vulnerability in their mobile device management and security policies to prevent potential exploitation.

1. Deploy the Samsung Security Maintenance Release (SMR) November 2025 update promptly on all affected Samsung Mobile Devices to patch the vulnerability. 2. Implement mobile device management (MDM) solutions that enforce timely OS and security patch updates. 3. Educate users about the risks of opening unsolicited or suspicious image files, especially from unknown sources or untrusted messaging platforms. 4. Employ advanced mobile threat defense (MTD) solutions capable of detecting and blocking malicious media files or suspicious app behavior. 5. Restrict or monitor the use of third-party applications that handle image processing if they do not come from trusted sources. 6. Use network-level protections such as secure email gateways and web filtering to block delivery of malicious content. 7. Conduct regular security awareness training focusing on social engineering tactics that could lead to exploitation of this vulnerability. 8. Monitor device logs and behavior for signs of memory corruption or abnormal crashes that could indicate exploitation attempts. 9. Coordinate with Samsung support and security advisories to stay informed about any emerging exploits or additional patches. 10. Consider isolating critical mobile devices or sensitive applications from general user devices to limit potential impact.