Unity discloses a years-old security exploit and urges developers to update their games

Unity is urging developers to take “immediate action” after it disclosed a major security vulnerability affecting games built using versions of its popular development tool dating back to 2017. While there is “no evidence of any exploitation of the vulnerability, nor has there been any impact on users or customers,” Unity already has fixes available to developers, according to a post from Larry Hryb, aka “Major Nelson.”

Specifically, developers need to take action if “you have developed and released a game or application using Unity 2017.1 or later for Windows, Android, or macOS,” Hryb says. Unity’s “platform partners” have also “taken further steps to secure their platforms and protect end users.”

Valve already released a new version of Steam that adds mitigations for the exploit, and “