Product Overview
OPSWAT MetaDefender Core protects your organization by preventing advanced cybersecurity threats on multiple data channels. MetaDefender Core leverages several proprietary technologies, including Deep Content Disarm and Reconstruction (Deep CDR), Multiscanning, File-Based Vulnerability Assessment, Data Loss Prevention and Threat Intelligence.
Release Highlights
Exclude Password-Protected Documents from Blocklist
Until this release, sanitization of password-protected documents was not supported. These files were blocklisted when you enabled the "BLOCKLIST UNSUPPORTED FILE TYPE" option in the Deep CDR workflow rule.
Now, via the new setting, you can exclude them from falling under the blocklist category. In your Workflow rule, go to the Deep CDR tab, and check the box EXCEPT THE PASSWORD PROTECTED OFFICE DOCUMENTS.
By default, this setting is not enabled to keep backward compatibility.

New CLI Tool to Analyze and Deeply Vacuum Database
PostgreSQL databases can become bulkier over time with high scanning traffic. In this version, we include the new file ometascan-vacuum-db that is bundled with your MetaDefender Core installation. When running simultaneously with MetaDefender Core, this tool will analyze your PostgreSQL database, vacuum the database effectively, and simplify IT administration processes.
Although not required, we recommend that you run this tool when MetaDefender Core scanning is at rest or not during peak hours to avoid scanning performing impact.
You can download the ometascan-vacuum-db file here:
- Windows: <MetaDefender Core installation folder>\ometascan-vacuum-db.exe
- Linux: /usr/sbin/ometascan-vacuum-db
Upgraded Third-Party Libraries
We made adjustments to the upgraded third-party libraries in MetaDefender Core 4.21.1 for even more security enhancement:
- (Built-in) PostgreSQL from 12.6 to 12.7
- NGINX web server from 1.18.0 to 1.20.1
- Remove outdated jsPDF 1.5.3
New Scan Status for Vulnerability Assessment
When the Vulnerability Assessment module is not enabled, the relevant vulnerability results in the MetaDefender Core scan result UI will be shown as "not configured", instead of “no vulnerability found”.
Please see our release notes for more improvements and fixes.
Learn more about MetaDefender Core or talk to our cybersecurity experts.
Release Details
- Product: MetaDefender Core
- Release Date: 13 July 2021
- Release Notes: 4.21.1
- Download Link on OPSWAT Portal: Download
