CVE-2025-53690—Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability

Vulnerability Name

Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability

Description

Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

• https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865
• https://nvd.nist.gov/vuln/detail/CVE-2025-53690

Related News Articles

• China-Linked APT Exploited Sitecore Zero-Day in Critical Infrastructure IntrusionJanuary 16, 2026
• China-linked hackers exploited Sitecore zero-day for initial accessJanuary 16, 2026
• China-Linked APT Exploited Sitecore Zero-Day in Critical Infrastructure IntrusionsJanuary 16, 2026
• China-Linked APT Exploits Sitecore Zero-Day in Attacks on American Critical InfrastructureJanuary 16, 2026
• Microsoft September 2025 Patch Tuesday fixes 81 flaws, two zero-daysSeptember 9, 2025

Related Weaknesses

• CWE-502