KEV Entry

CVE-2025-55182

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2025-55182

2025-12-05 01:00 CET

Timestamps

2025-12-05

2025-12-05

Scope

Meta React Server Components Remote Code Execution Vulnerability | Affected: Meta / React Server Components | Description: Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182. | Required 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. | Due date: 2025-12-12 | Known ransomware campaign use (KEV): Known | Notes (KEV): Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182

References
  • {'id': 'CVE-2025-55182', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-55182'}

b5086cfa-0eb4-4d13-8f6d-4e4731866cb4

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-02 08:09 CEST

2026-10-02 08:09 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [],
  "date_added": "2025-12-05",
  "due_date": "2025-12-12",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Known",
  "product": "React Server Components",
  "vendorProject": "Meta",
  "vulnerabilityName": "Meta React Server Components Remote Code Execution Vulnerability"
}
 -
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