Description
China-linked hackers (UAT-8837) exploited this zero-day for initial access into North American critical infrastructure.
Required Action
Fix: Apply Sitecore patches and look for IOCs related to "Earthworm" trojan.
References
Assess Your Risk
Use the CVSS Calculator to evaluate how this vulnerability affects your specific environment. Consider your network exposure, existing mitigations, and asset criticality.
Frequently Asked Questions
What is CVE-2025-53690?
CVE-2025-53690 (State-Sponsored Exploitation (Sitecore)) is a vulnerability with a CVSS score of 10 (CRITICAL). This is an actively exploited zero-day vulnerability. China-linked hackers (UAT-8837) exploited this zero-day for initial access into North American critical infrastructure.
How do I fix CVE-2025-53690?
Apply Sitecore patches and look for IOCs related to "Earthworm" trojan.
How severe is CVE-2025-53690?
CVE-2025-53690 has a CVSS score of 10, classified as CRITICAL. This vulnerability was previously in the CISA KEV catalog.
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