Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:LCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2025-66633 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Canva Affinity. Its CVSS base score is 6.1 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked at the 19th 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 map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2025-66633 is an out-of-bounds read vulnerability (CWE-125) in the EMF functionality of Canva Affinity software. Published on 2026-03-17, it carries a CVSS v3.1 base score of 6.1 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L). The issue arises when processing a specially crafted EMF file, which triggers an out-of-bounds read that could potentially disclose sensitive information.
An attacker with local access can exploit this vulnerability by tricking a user into opening a maliciously crafted EMF file through the affected Canva Affinity component. No special privileges are required, though the attack has low complexity and relies on user interaction. Successful exploitation enables high-impact confidentiality loss, such as memory contents leakage, with low availability impact and no integrity impact.
Mitigation details are available in vendor advisories, including the Cisco Talos Intelligence report at https://talosintelligence.com/vulnerability_reports/TALOS-2025-2313 (also at https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2313) and Canva's security update at https://trust.canva.com/?tcuUid=1f728b0d-17f3-4c9c-97e9-6662b769eb62. Security practitioners should consult these for patching instructions and workarounds.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208807
Vulnerability Data
An out-of-bounds read 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 read, potentially leading to the disclosure of sensitive information.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation directly finds out-of-bounds read flaws through static analysis, fuzzing, and dynamic bounds checks.
Secure engineering principles require bounds checking and memory-safe constructs that stop out-of-bounds reads from being introduced.
Process isolation confines the effects of an out-of-bounds read to the compromised process.
Input validation rejects malformed indices or lengths that would otherwise cause reads outside buffer bounds.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure-development practices such as bounds checking and memory-safe languages directly prevent out-of-bounds reads.
Vulnerability scanning and recording can discover instances of out-of-bounds reads after code is deployed.
Routine patching replaces vulnerable code containing out-of-bounds read flaws.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development and acceptance includes fuzzing and static analysis that detect out-of-bounds read defects before release.
Secure coding standards explicitly forbid unsafe pointer arithmetic and mandate bounds-checked reads, eliminating CWE-125.