CVE-2025-66042 is a medium-severity vulnerability classified under CWE-125 (Out-of-bounds Read) affecting Canva Affinity version 3.0.1.3808. The flaw exists in the Enhanced Metafile (EMF) functionality, where the software improperly handles specially crafted EMF files, leading to an out-of-bounds read condition. This vulnerability allows an attacker to read memory beyond the intended buffer boundaries, potentially exposing sensitive information stored in adjacent memory regions. The attack vector is local (AV:L), requiring the attacker to deliver a malicious EMF file to the victim and rely on user interaction (UI:R) to open or process the file. No privileges are required (PR:N), and the scope is unchanged (S:U), meaning the vulnerability affects only the vulnerable component without impacting other system components. The confidentiality impact is high (C:H), as sensitive data disclosure is possible, but integrity and availability impacts are low or none (I:N, A:L). Although no known exploits are currently observed in the wild, the vulnerability poses a risk to users who handle untrusted EMF files within Canva Affinity. The lack of available patches at the time of publication necessitates vigilance and interim protective measures. This vulnerability highlights the risks associated with processing complex file formats like EMF without robust boundary checks.

The primary impact of CVE-2025-66042 is the potential disclosure of sensitive information due to an out-of-bounds read in Canva Affinity's EMF processing. Organizations using this software, particularly in creative, marketing, and design industries, could have confidential project data or intellectual property exposed if an attacker convinces a user to open a malicious EMF file. While the vulnerability does not allow code execution or system compromise, the confidentiality breach can lead to information leakage, which may facilitate further attacks or corporate espionage. The requirement for local access and user interaction limits the attack surface but does not eliminate risk, especially in environments where files are shared frequently. The medium severity rating suggests moderate urgency; however, targeted attacks against high-value organizations could increase the threat level. The absence of known exploits reduces immediate risk but also means organizations should proactively prepare for potential future exploitation.

To mitigate CVE-2025-66042, organizations should implement several specific measures: 1) Restrict the opening of EMF files from untrusted or unknown sources within Canva Affinity; 2) Educate users about the risks of opening unsolicited or suspicious EMF files, emphasizing cautious handling of email attachments and downloads; 3) Employ application whitelisting or sandboxing techniques to isolate Canva Affinity processes, limiting the impact of potential exploitation; 4) Monitor for official patches or updates from Canva and apply them promptly once released; 5) Use endpoint detection and response (EDR) tools to detect anomalous behavior related to file processing; 6) Consider disabling or limiting EMF file support if not essential to business operations; 7) Maintain regular backups and incident response plans to address any potential data exposure. These targeted actions go beyond generic advice by focusing on the specific attack vector and software involved.