SecurityHackers exploited Sitecore zero-day flaw to deploy backdoors Posted on September 4, 2025 by Onsite Computing, Inc. Threat actors have been exploiting a zero-day vulnerability in legacy Sitecore deployments to deploy WeepSteel reconnaissance malware. […] Go to Source Author: Bill Toulas Onsite Computing, Inc. Russian APT28 Deploys “NotDoor” Outlook Backdoor Against Companies in NATO Countries Phishing Empire Runs Undetected on Google, Cloudflare