CVE-2021-21426

9.8 criticalEPSS 1.2%

Critical (9.8) in openmage magento. EPSS 1.2% chance of exploitation in the next 30 days.

Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and prior and 20.0.8 and prior, there is a vulnerability caused by the unsecured deserialization of an object. A patch in versions 19.4.13 and 20.0.9 was back ported from Zend Framework 3. The vulnerability was assigned CVE-2021-3007 in Zend Framework.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2021-04-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

openmage:magento

References

https://github.com/OpenMage/magento-lts/security/advisories/GHSA-m496-x567-f98c
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-m496-x567-f98c

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