Libraesva rolled out an emergency update for its Email Security Gateway (ESG) solution to fix a vulnerability exploited by threat actors believed to be state sponsored.

The email security product protects email systems from phishing, malware, spam, business email compromise, and spoofing, using a multi-layer protection architecture.

According to the vendor, Libraesva ESG is used by thousands of small and medium businesses as well as large enterprises worldwide, serving over 200,000 users.