CISA Adds Critical Meta React Server Components RCE Flaw (CVE-2025-55182) to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical vulnerability in Meta's React Server Components (RSC), tracked as CVE-2025-55182 (CVSS score: 10.0), to its Known Exploited Vulnerabilities (KEV) catalog. This pre-authentication remote code execution (RCE) flaw poses a severe risk as it allows unauthenticated attackers to execute arbitrary code on affected systems. The inclusion in CISA's KEV catalog mandates U.S. federal agencies to apply patches within a specified regulatory timeframe, though the article does not disclose the exact deadline or details of active exploitation. React Server Components are designed for server-side rendering in web applications, making this vulnerability particularly concerning for developers leveraging Meta's framework. The critical severity and addition to KEV suggest either confirmed exploitation or a high likelihood of imminent attacks. Cybersecurity professionals should prioritize patching affected systems immediately. While the source article does not provide technical specifics of the exploit or confirmation of in-the-wild attacks, the CVSS 10.0 rating and CISA's action underscore the urgency. Organizations using React Server Components must assess their exposure and apply vendor-provided mitigations without delay to prevent potential compromise.