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ConnectWise warns of new ScreenConnect flaw without patch

ConnectWise warns of an unpatched ScreenConnect flaw affecting file transfer in support sessions and shares interim mitigations for MSPs.

ConnectWise disclosed a new ScreenConnect Remote Access vulnerability affecting file transfer behavior in both cloud and on-premises deployments; no CVE ID or patch is available yet, with a fix planned later this week. The vendor published temporary mitigation steps that remove TransferFiles permissions from session groups across all roles. Shadowserver tracks nearly 6,000 internet-exposed ScreenConnect instances. Previous ScreenConnect flaws, including CVE-2024-1709, were exploited by ransomware gangs and North Korea's Kimsuky, and three ScreenConnect vulnerabilities are on CISA's actively exploited catalog.

ConnectWise patches critical ScreenConnect authentication failure after five days

ConnectWise patched ScreenConnect flaw CVE-2026-84869 five days after warning files could be transferred and executed via active sessions without authorization.

ConnectWise released ScreenConnect client version 26.6.5 and later to fix CVE-2026-84869, an authentication failure in ConnectWise Remote Access allowing unauthorized file transfer and execution through active remote sessions. The company warned customers on September 3 and advised admins to remove the TransferFiles permission from users with open sessions as an interim mitigation. The advisory does not state that exploitation has been observed.

CSO Onlineupdated · 2d agofirst · 4d agoVulnerability 3 sourcesCVE-2026-84869