Accellion

Accellion, also known as Accellium, is headquartered in Israel. The organization provides file transfer software that enables organizations to securely exchange large volumes of data between internal systems and external partners. Its technology is designed for environments requiring controlled file movement and audit capabilities. Accellion's offerings have been adopted by a range of enterprises seeking managed file transfer functionality. The company positions itself within the broader secure data exchange market.

Accellion's client base spans multiple sectors, including higher education institutions, legal firms, telecommunications providers, and financial services organizations. In January 2021, a cyberattack exploited vulnerabilities in Accellion's file transfer system, affecting numerous clients across those sectors. The attackers, identified as the CLOP ransomware group, exfiltrated data and demanded extortion payments, threatening to release stolen information. Affected organizations faced decisions about paying ransoms or risking public data leaks, leading to data dumps for those who refused. Accellion responded by addressing a critical vulnerability, though additional flaws were later discovered as the attack persisted. The incident highlighted the risks associated with file transfer solutions and prompted broader industry scrutiny of such technologies.