CISA has reminded federal agencies and private sector partners of the looming December 26 deadline to remediate the “React2Shell” vulnerability (CVE-2025-55182). This critical flaw (CVSS 10.0) allows unauthenticated remote code execution on web servers running vulnerable versions of the React framework.
Business Impact
Failure to remediate by tomorrow leaves organizations open to “Zero-Hour” exploitation, which has already been observed by China-nexus actors. For consultancies, this is the final compliance check for the year to prevent the total takeover of web-facing applications and data exfiltration.
Why It Happened
The flaw exists in the React Server Components (RSC) implementation, specifically around how it handles certain deserialization requests. Attackers have weaponized this in record time due to the ubiquitous nature of the React framework.
Recommended Executive Action
Verify that all production web applications have been updated to the patched versions of React. For your clients in Bahrain, ensure that external-facing portals have undergone a final automated vulnerability scan before the weekend.
Hashtags: #React2Shell #CISA #KEV #Vulnerability #CyberSecurity #PatchNow #Compliance #InfoSec