CVE-2026-21347: 
Adobe Bridge vulnerability analysis and mitigation

CVE-2026-21347 is an Integer Overflow or Wraparound vulnerability (CWE-190) in Adobe Bridge that can result in arbitrary code execution in the context of the current user. It affects Adobe Bridge versions 15.1.3 and earlier (15.x branch) and 16.0.1 and earlier (16.x branch). The vulnerability was disclosed and patched on February 10, 2026, as part of Adobe's February 2026 security update cycle. It carries a CVSS v3.1 base score of 7.8 (High) (Adobe Advisory).

The vulnerability is rooted in an integer overflow or wraparound condition (CWE-190) within Adobe Bridge's file parsing logic, which can be triggered when a victim opens a specially crafted malicious file. This class of bug occurs when arithmetic operations produce a value that exceeds the maximum size of the integer type, causing the result to wrap around to an unexpected value — which can corrupt memory and redirect code execution. Exploitation requires local access and user interaction (the victim must open a malicious file), with no privileges required on the part of the attacker. No public proof-of-concept code has been identified as of the time of disclosure (Adobe Advisory).

Successful exploitation allows an unauthenticated attacker to execute arbitrary code in the context of the current user running Adobe Bridge, potentially resulting in full compromise of confidentiality, integrity, and availability at the user's privilege level. An attacker could read sensitive files, modify data, or install malware on the affected system. The scope is limited to the local user context and does not inherently enable privilege escalation or lateral movement beyond the compromised account (Adobe Advisory).

Adobe has released patched versions addressing this vulnerability: users on the 15.x branch should update to Adobe Bridge 15.1.4 or later, and users on the 16.x branch should update to Adobe Bridge 16.0.2 or later. As an interim measure, users should avoid opening Bridge files from untrusted or unknown sources. Organizations should also consider restricting user permissions to limit the potential impact of code execution if patching cannot be performed immediately (Adobe Advisory, CIS Advisory).

The Center for Internet Security (CIS) issued an advisory noting that multiple vulnerabilities in Adobe products, including this one, could allow for arbitrary code execution, recommending prompt patching (CIS Advisory). Tenable published a plugin (ID 298515) to detect vulnerable Adobe Bridge installations (Tenable). Overall community reaction has been muted given the absence of active exploitation and the requirement for user interaction.