
Critical ScreenConnect Vulnerability CVE-2026-84869 Under Active Attack
In September 2026, CISA added ConnectWise ScreenConnect vulnerability CVE-2026-84869 to its Known Exploited Vulnerabilities catalog after confirming active exploitation in the wild. The critical-severity flaw allows attackers with basic privileges to transfer and execute files through active remote sessions without authorization or host confirmation. The vulnerability affects ScreenConnect clients and enables low-complexity attacks requiring no user interaction, prompting CISA to order federal agencies to patch within three days. Over 1,000 vulnerable ScreenConnect instances remain exposed online according to Shadowserver tracking. This incident highlights the ongoing targeting of remote access tools by both ransomware groups and state-sponsored actors, with ScreenConnect facing its fourth CISA-flagged vulnerability since 2024. The exploitation underscores the critical security risks posed by widely-deployed MSP platforms that provide privileged access to thousands of customer environments.
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