CVE-2026-21346 is an out-of-bounds write vulnerability classified under CWE-787 affecting Adobe Bridge versions 15.1.3, 16.0.1, and earlier. The vulnerability arises when Adobe Bridge improperly handles certain file inputs, leading to memory corruption through writing outside the intended buffer boundaries. This flaw can be exploited by an attacker who crafts a malicious file that, when opened by the user in Adobe Bridge, triggers arbitrary code execution within the context of the current user. The attack vector requires local access and user interaction, as the victim must open the malicious file. The vulnerability does not require elevated privileges or prior authentication, increasing its risk profile. The CVSS 3.1 base score of 7.8 reflects high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges required. Although no exploits are currently known in the wild, the potential for exploitation exists, especially targeting users in creative and media sectors where Adobe Bridge is commonly used for digital asset management. The vulnerability could allow attackers to execute malicious payloads, steal sensitive information, or disrupt operations. Adobe has not yet released patches, so organizations must monitor for updates and apply them promptly once available.

For European organizations, this vulnerability poses a significant risk, particularly for companies in media, advertising, design, and other creative industries that rely heavily on Adobe Bridge for managing digital assets. Successful exploitation could lead to unauthorized code execution, data theft, or system compromise, impacting confidentiality, integrity, and availability of critical business data. The requirement for user interaction limits mass exploitation but targeted attacks via phishing or malicious file distribution remain plausible. Disruption of workflows and potential data breaches could result in financial losses, reputational damage, and regulatory penalties under GDPR if personal data is compromised. Organizations with remote or hybrid work environments face increased exposure due to file sharing practices. The absence of known exploits provides a window for proactive defense, but the high CVSS score underscores the urgency of mitigation.

1. Monitor Adobe’s official channels for security updates and apply patches immediately once released to remediate the vulnerability. 2. Until patches are available, restrict the opening of files from untrusted or unknown sources in Adobe Bridge. 3. Implement strict email and file filtering to block or quarantine suspicious attachments that could exploit this vulnerability. 4. Educate users about the risks of opening unsolicited or unexpected files, emphasizing caution with files received via email or external media. 5. Deploy endpoint detection and response (EDR) solutions capable of detecting anomalous behavior indicative of exploitation attempts, such as unexpected code execution or memory corruption. 6. Use application whitelisting to limit execution of unauthorized code. 7. Consider isolating Adobe Bridge usage environments or running the application with least privilege to minimize impact if exploited. 8. Regularly back up critical data and verify backup integrity to enable recovery in case of compromise.