High Threat Security Alert (A26-10-63): Multiple Vulnerabilities in Synology Products

Description:

Synology has released security updates to address multiple vulnerabilities in several Synology packages. For detailed information about the vulnerabilities, please refer to the corresponding security advisories at vendor's website.

Reports indicate that proof-of-concept (PoC) exploit code is available for the vulnerabilities. System administrators are advised to take immediate action to patch affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Synology Calendar versions prior to 3.0.4-21435
• Synology Mail Station versions prior to 30000002.3.19-20333
• PHP 7.3
• PHP 7.4 versions prior to 7.4.33-0010, 7.4.33-0131, 7.4.33-0122
• PHP 8.0 versions prior to 8.0.30-0104, 8.0.30-0122
• PHP 8.1 versions prior to 8.1.34-0120
• PHP 8.2 versions prior to 8.2.35-0171
• PHP 8.3 versions prior to 8.3.36-0051
• PHP 8.4 versions prior to 8.4.27-0051

For detailed information of the affected systems, please refer to the corresponding security advisories at vendor's website.

Impact:

Successful exploitation of the vulnerabilities could lead to remote code execution or information disclosure on an affected system.

Recommendation:

Software updates for affected systems are now available. System administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk. For detailed information of the available patches, please refer to security advisory at vendor's website.

System administrators should contact their product support vendors for the fixes and assistance.

More Information:

• https://www.synology.com/en-us/security/advisory/Synology_SA_26_14
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-109618 (to CVE-2026-109619)