ConnectWise has disclosed a vulnerability in its Automate remote monitoring and management (RMM) platform that could allow attackers to bypass integrity verification mechanisms and execute malicious code in affected environments.
The flaw impacts on-premises versions of ConnectWise Automate prior to version 2026.5 and carries a CVSS score of 8.8.
“Under certain conditions, components obtained during these operations may be processed without full integrity verification prior to loading,” said ConnectWise in its advisory.
Key Takeaways of the ConnectWise Vulnerability
- ConnectWise disclosed CVE-2026-9089 affecting Automate on-premises versions prior to 2026.5.
- The flaw could allow integrity check bypass and remote code execution through malicious components.
- ConnectWise Automate’s plugin loading and self-update features are impacted
- Cloud-hosted instances were updated automatically and no active exploitation has been reported.
Inside the ConnectWise Automate Vulnerability
The vulnerability, CVE-2026-9089, affects ConnectWise Automate’s plugin loading and self-update features, which distribute updates and agent functionality across managed environments.
According to ConnectWise, certain downloaded components may execute without complete integrity validation checks, potentially allowing tampered or malicious code to bypass authenticity safeguards before being loaded by the platform.
The vulnerability affects all on-premises ConnectWise Automate deployments running versions earlier than 2026.5, while cloud-hosted instances have already been updated automatically.
This issue is concerning because ConnectWise Automate is often used for remote management and automation across MSP environments, where its elevated privileges and broad network access could increase the impact of a compromise.
If exploited, attackers could potentially distribute malicious payloads, establish persistence, perform lateral movement, or compromise downstream customer environments through trusted administrative channels.
The company did not report any exploitation in the wild at the time of publication.
How to Reduce RMM Risk
As organizations continue relying on remote management platforms for day-to-day operations, maintaining the security of those environments remains important.
Security teams should focus on timely patching, improving visibility into RMM activity, and reducing unnecessary exposure across managed systems.
- Patch to the latest version for on-premise deployments and verify that integrity validation mechanisms are enabled across all agent and plugin components.
- Monitor logs, network traffic, and SIEM alerts for anomalous plugin activity, unexpected agent updates, or suspicious remote management behavior.
- Restrict unnecessary network exposure and segment RMM infrastructure from production environments to reduce lateral movement risks.
- Enforce multi-factor authentication, least privilege access, and privileged access management controls for all administrative and service accounts tied to RMM platforms.
- Implement application allowlisting, code-signing verification, and file integrity monitoring to prevent unauthorized scripts, plugins, or binaries from executing.
- Regularly test incident response, disaster recovery, and containment plans involving RMM compromise or software supply chain attack scenarios.
- Maintain offline backups, disable unused plugins and integrations, and continuously assess third-party RMM dependencies for emerging supply chain and operational risks.
Together, these measures can help reduce exposure and build resilience against RMM and supply chain-related threats.
Trusted Infrastructure Risks
The ConnectWise Automate vulnerability highlights the ongoing security challenges associated with centralized management and automation platforms in enterprise environments.
Because MSPs and IT teams depend on RMM tools to manage systems, deploy updates, and automate administrative tasks at scale, weaknesses affecting trusted update and software delivery mechanisms can create broader operational risk.
Supply chain incidents and compromises involving software management platforms have also shown that attackers continue targeting trusted infrastructure as a way to gain access to connected systems and expand their reach within enterprise networks.
As organizations look to reduce the risks associated with trusted platforms and broad network access, some are turning to zero trust strategies to strengthen segmentation, access controls, and overall resilience.