CVE-2025-55182 in Meta React Server Components: exploited now
Attackers are exploiting CVE-2025-55182 in Meta React Server Components. CISA has listed it as known exploited since 5 December 2025.
Ransomware groups have used this vulnerability.
| Product | Meta React Server Components |
|---|---|
| Known exploited since | 5 December 2025 |
| Ransomware use | Recorded |
| EU vulnerability database | EUVD-2025-200983 |
| Sources | NVD · CISA KEV |
What it means
Attackers have used this vulnerability in real attacks. An unpatched Meta React Server Components that can be reached from the internet is exposed to them.
What to do
- Find every system running Meta React Server Components, starting with those reachable from the internet.
- Apply the vendor's fix, or take the system off the internet until you can.
- Check the system for signs that it was reached before the fix.
How Vardion finds it
Wherever a scan or your imported scanner results find CVE-2025-55182, Vardion names the systems affected and puts the fix at the top of the list.
Know before an attacker does
Vardion checks your servers, websites, domains and leaked staff accounts on the schedule you set and tells you what to fix first, in plain words.
From CISA's known exploited vulnerabilities catalogue as it stood on 4 October 2026.