The attack landscape has been dynamic following the disclosure of the React Server Components RCE vulnerability. New information has emerged regarding the initial Proof-of-Concept exploit, as well as improved detection methods, exploitation mechanics observed in the wild, and rapidly growing attack activity. This update summarizes the changes and observations we ... Read More

On December 3, 2025, React maintainers disclosed a critical unauthenticated remote code execution (RCE) vulnerability in React Server Components (RSC), tracked as CVE-2025-55182. A working PoC was released publicly, and Wallarm immediately began observing widespread exploitation attempts across customer environments. What is CVE-2025-55182? CVE-2025-55182 is an unauthenticated remote code execution ... Read More

On July 19, 2025, a critical remote code execution (RCE) vulnerability (CVE-2025-53770, also referred to as ToolShell) was publicly disclosed, impacting on-premises Microsoft SharePoint Server installations. This vulnerability allows unauthenticated attackers to execute arbitrary code remotely by leveraging insecure deserialization techniques. Given the platform’s widespread use and exposure to the ... Read More

In early May 2025, Cisco released software fixes to address a flaw in its IOS XE Software for Wireless LAN Controllers (WLCs). The vulnerability, tracked as CVE-2025-20188, has a CVSS score of 10.0 and could enable an unauthenticated, remote attacker to upload arbitrary files to a susceptible system – but ... Read More