CVE-2026-34687 is a heap-based buffer overflow vulnerability affecting Adobe Illustrator versions 29.8.6, 30.3, and earlier. The vulnerability allows arbitrary code execution in the context of the current user upon opening a malicious file, requiring user interaction. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No official patch or remediation level has been disclosed at this time, and no known exploits are reported in the wild.

Successful exploitation can lead to arbitrary code execution with the privileges of the current user, potentially compromising confidentiality, integrity, and availability of the affected system. Since user interaction is required, the risk is mitigated by user caution but remains significant due to the high severity rating.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should avoid opening files from untrusted sources and apply general caution when handling Illustrator files.