CVE-2025-64301
Published: 17 March 2026
Summary
CVE-2025-64301 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Canva Affinity. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 4.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-64301 is an out-of-bounds write vulnerability (CWE-787) in the EMF functionality of Canva Affinity software. Published on 2026-03-17, it has a CVSS v3.1 base score of 7.8 (High), with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The flaw can be triggered by processing a specially crafted EMF file, enabling an out-of-bounds write that may lead to arbitrary code execution.
A local attacker can exploit this vulnerability by convincing a user to open a malicious EMF file in Canva Affinity, as no privileges are required and attack complexity is low. Successful exploitation grants high-impact confidentiality, integrity, and availability effects, potentially allowing code execution in the context of the affected application.
Mitigation details are available in advisories from Talos Intelligence (TALOS-2025-2310) and Canva's trust center, which outline patches and recommended actions for affected versions of Canva Affinity.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208795
Vulnerability details
An out‑of‑bounds write vulnerability exists in the EMF functionality of Canva Affinity. By using a specially crafted EMF file, an attacker could exploit this vulnerability to perform an out‑of‑bounds write, potentially leading to code execution.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Out-of-bounds write in client-side EMF parser enables arbitrary code execution when a user opens a malicious file (T1204.002), directly matching Exploitation for Client Execution (T1203).
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Mandates timely remediation of identified flaws, such as patching the out-of-bounds write vulnerability in Canva Affinity's EMF parser to eliminate exploitability.
Implements memory protection mechanisms like address space randomization and non-executable memory to block code execution from out-of-bounds writes in EMF processing.
Requires validation of information inputs, including specially crafted EMF files, to restrict out-of-bounds writes during parsing.