Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
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.
- Vendor
- Sitecore
- Product
- Multiple Products
- CVSS
- 9.0
- EPSS (exploit probability)
- 60.6%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2025-53690 being exploited?
Yes. CISA added CVE-2025-53690 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 60.6% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-24. Full cross-catalog view: /kev-comparison
CVE-2025-53690 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Sitecore CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2019-9875 Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability | [ HIGH ] | 8.8 | 13.8% | |
| CVE-2019-9874 Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability | [ CRITICAL ] | 9.8 | 83.7% | |
| CVE-2021-42237 Sitecore XP Remote Command Execution Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 97.6% |