Unknown · Zend Framework · CVE-2021-21426
**Name of the Vulnerable Software and Affected Versions**
magento-lts versions 19.4.12 and prior
magento-lts versions 20.0.8 and prior
**Description**
The issue is caused by the unsecured deserialization of an object. A patch was back ported from Zend Framework 3 to resolve the issue.
**Recommendations**
For magento-lts versions 19.4.12 and prior, update to version 19.4.13 or later.
For magento-lts versions 20.0.8 and prior, update to version 20.0.9 or later.