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CVE-2025-53690: Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
Sitecore Multiple Products · in CISA KEV since 2025-09-04
2025-09-04added to KEV
2025-09-25federal remediation due date
51.09%EPSS exploit probability (30 days) 98.9th percentile
9 CRITICALCVSS 3.1
Unknownknown ransomware use
1days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-502 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2025-09-03 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-53690.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.