Exploited CVEs / CVE-2025-55182
CVE-2025-55182
Meta React Server Components Remote Code Execution Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2025-12-12 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited Meta React Server Components vulnerability, Critical severity, CVSS 10.0. Added to the CISA KEV catalog 2025-12-05.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2025-55182
This is an unauthenticated remote code execution flaw in Meta React Server Components, triggered by how React decodes payloads sent to React Server Function endpoints. Any app exposing Server Function endpoints is reachable without credentials, and this carries a maximum CVSS 10.0 with a 100 percent EPSS score. It is confirmed exploited in the wild, added to CISA KEV on 2025-12-05, and already tied to ransomware campaigns.
Do this: Inventory all apps using React Server Components, patch to the fixed React version immediately, and restrict or monitor Server Function endpoints until the update is deployed.
AI-generated from public data, 2026-07-22. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-55182
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2025-55182
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2025-12-12 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2025-55182
Check the vendor's security advisory channel for the patched React Server Components versions and workarounds.
Common questions about CVE-2025-55182
Is CVE-2025-55182 actively exploited?
Yes. CVE-2025-55182 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2025-12-05, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2025-55182?
CISA set the federal (BOD 22-01) remediation due date at 2025-12-12, which has passed; treat any unremediated system as overdue. The verbatim 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.
What fixes CVE-2025-55182?
Check the vendor's security advisory for the patched React Server Components versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2025-55182?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2025-55182's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
