CVE-2021-35990 is an out-of-bounds write vulnerability (CWE-787) found in Adobe Bridge version 11.0.2 and earlier. This vulnerability arises when Adobe Bridge parses a specially crafted file, leading to memory corruption due to writing outside the bounds of allocated memory. Such memory corruption can be exploited by an unauthenticated attacker to achieve arbitrary code execution within the context of the current user. However, exploitation requires user interaction, specifically that the victim opens a maliciously crafted file using Adobe Bridge. The vulnerability does not require prior authentication, increasing the attack surface, but the need for user action limits the ease of exploitation. No known exploits have been reported in the wild to date. Adobe Bridge is a digital asset management application widely used by creative professionals to organize and manage media files. The vulnerability's root cause is improper bounds checking during file parsing, which can lead to memory corruption and potential execution of attacker-supplied code. Since the attack vector involves opening a malicious file, typical attack scenarios include spear-phishing campaigns or delivery of malicious files via compromised websites or removable media. The vulnerability affects confidentiality, integrity, and availability by enabling arbitrary code execution, which could lead to data theft, system compromise, or denial of service. No official patches or updates are linked in the provided information, so affected users should verify Adobe's security advisories for remediation.

For European organizations, the impact of CVE-2021-35990 can be significant, especially for those in creative industries, media companies, advertising agencies, and any sectors relying on Adobe Bridge for digital asset management. Successful exploitation could allow attackers to execute arbitrary code, potentially leading to unauthorized access to sensitive media assets, intellectual property theft, or lateral movement within corporate networks. Given that Adobe Bridge runs with user-level privileges, the attacker’s capabilities are limited to the current user context; however, if the user has elevated privileges or access to critical systems, the impact escalates. The requirement for user interaction reduces the likelihood of widespread automated exploitation but does not eliminate targeted attacks, such as spear-phishing. Additionally, compromised systems could be used as footholds for further attacks, including ransomware deployment or espionage. The absence of known exploits in the wild suggests limited active exploitation, but the vulnerability remains a risk until patched. Organizations with large creative teams or those handling sensitive media content should prioritize addressing this vulnerability to prevent potential breaches.

1. Immediate verification of Adobe Bridge versions in use across the organization and upgrading to the latest patched version once available from Adobe. 2. Implement strict email and file filtering to detect and block suspicious or unexpected file types that could be used to exploit this vulnerability. 3. Conduct user awareness training focused on the risks of opening unsolicited or unexpected files, especially from unknown sources. 4. Employ application whitelisting to restrict execution of unauthorized files and scripts within the environment. 5. Use endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of exploitation attempts, such as unexpected process launches or memory corruption indicators. 6. Segment networks to limit lateral movement if a user system is compromised. 7. Regularly back up critical data and verify restoration procedures to mitigate potential damage from exploitation outcomes like ransomware. 8. Monitor Adobe security advisories for official patches or updates and apply them promptly. 9. Where possible, restrict Adobe Bridge usage to users who require it, minimizing exposure.