CVE-2025-11493: CWE-494 Download of Code Without Integrity Check in ConnectWise Automate
The ConnectWise Automate Agent does not fully verify the authenticity of files downloaded from the server, such as updates, dependencies, and integrations. This creates a risk where an on-path attacker could perform a man-in-the-middle attack and substitute malicious files for legitimate ones by impersonating a legitimate server. This risk is mitigated when HTTPS is enforced and is related to CVE-2025-11492.
AI Analysis
Technical Summary
CVE-2025-11493 identifies a critical security vulnerability in ConnectWise Automate, a widely used remote monitoring and management (RMM) platform. The vulnerability stems from the ConnectWise Automate Agent's failure to fully verify the integrity and authenticity of files downloaded from its server, including updates, dependencies, and integrations. This verification gap corresponds to CWE-494: Download of Code Without Integrity Check. An attacker positioned on the network path between the agent and the server can exploit this by conducting a man-in-the-middle (MITM) attack, impersonating the legitimate server, and substituting malicious payloads for legitimate files. Such malicious files could include backdoors, ransomware, or other malware, enabling attackers to compromise the target system fully. The vulnerability is mitigated if HTTPS is strictly enforced, as TLS encryption and server certificate validation prevent MITM attacks. However, if HTTPS is not enforced or improperly configured, the risk remains high. The CVSS v3.1 base score is 8.8 (high), reflecting the vulnerability's ease of exploitation (low attack complexity, no privileges or user interaction required), and its severe impact on confidentiality, integrity, and availability. The affected versions include all ConnectWise Automate releases prior to 2025.9. While no exploits have been observed in the wild yet, the vulnerability's nature and potential impact make it a critical concern for organizations relying on ConnectWise Automate for IT infrastructure management. This vulnerability is related to CVE-2025-11492, suggesting a broader issue with the product's update and file verification mechanisms.
Potential Impact
For European organizations, this vulnerability poses a significant threat, especially for managed service providers (MSPs) and enterprises that depend on ConnectWise Automate for remote monitoring and management of IT assets. Exploitation could lead to unauthorized code execution, data breaches, ransomware deployment, and disruption of critical IT services. The compromise of MSP infrastructure could cascade, affecting multiple client organizations simultaneously, amplifying the impact across sectors such as finance, healthcare, manufacturing, and government. Confidentiality breaches could expose sensitive personal and corporate data, violating GDPR and other data protection regulations, leading to legal and financial penalties. Integrity and availability impacts could disrupt business operations, causing downtime and loss of trust. The risk is heightened in environments where HTTPS enforcement is lax or network segmentation is insufficient, allowing attackers easier access to intercept traffic. Given the criticality of IT management platforms, the vulnerability could be leveraged for persistent footholds within European networks, facilitating advanced persistent threats (APTs) or supply chain attacks.
Mitigation Recommendations
European organizations should immediately upgrade ConnectWise Automate to version 2025.9 or later, where this vulnerability is addressed. Until patching is complete, enforce strict HTTPS usage for all agent-server communications by configuring the product to reject non-TLS connections and verifying server certificates rigorously. Implement network segmentation to isolate management traffic and reduce exposure to on-path attackers. Employ network-level protections such as TLS interception detection and anomaly-based intrusion detection systems to identify suspicious MITM attempts. Regularly audit and monitor ConnectWise Automate logs for unusual file downloads or update behaviors. Consider deploying endpoint detection and response (EDR) solutions capable of detecting unauthorized code execution stemming from malicious file substitutions. Additionally, educate IT staff about the risks of MITM attacks and ensure secure VPN or private network channels for remote management traffic. Finally, maintain a robust incident response plan tailored to supply chain and RMM platform compromises.
Affected Countries
United Kingdom, Germany, France, Netherlands, Sweden, Italy, Spain, Poland
CVE-2025-11493: CWE-494 Download of Code Without Integrity Check in ConnectWise Automate
Description
The ConnectWise Automate Agent does not fully verify the authenticity of files downloaded from the server, such as updates, dependencies, and integrations. This creates a risk where an on-path attacker could perform a man-in-the-middle attack and substitute malicious files for legitimate ones by impersonating a legitimate server. This risk is mitigated when HTTPS is enforced and is related to CVE-2025-11492.
AI-Powered Analysis
Technical Analysis
CVE-2025-11493 identifies a critical security vulnerability in ConnectWise Automate, a widely used remote monitoring and management (RMM) platform. The vulnerability stems from the ConnectWise Automate Agent's failure to fully verify the integrity and authenticity of files downloaded from its server, including updates, dependencies, and integrations. This verification gap corresponds to CWE-494: Download of Code Without Integrity Check. An attacker positioned on the network path between the agent and the server can exploit this by conducting a man-in-the-middle (MITM) attack, impersonating the legitimate server, and substituting malicious payloads for legitimate files. Such malicious files could include backdoors, ransomware, or other malware, enabling attackers to compromise the target system fully. The vulnerability is mitigated if HTTPS is strictly enforced, as TLS encryption and server certificate validation prevent MITM attacks. However, if HTTPS is not enforced or improperly configured, the risk remains high. The CVSS v3.1 base score is 8.8 (high), reflecting the vulnerability's ease of exploitation (low attack complexity, no privileges or user interaction required), and its severe impact on confidentiality, integrity, and availability. The affected versions include all ConnectWise Automate releases prior to 2025.9. While no exploits have been observed in the wild yet, the vulnerability's nature and potential impact make it a critical concern for organizations relying on ConnectWise Automate for IT infrastructure management. This vulnerability is related to CVE-2025-11492, suggesting a broader issue with the product's update and file verification mechanisms.
Potential Impact
For European organizations, this vulnerability poses a significant threat, especially for managed service providers (MSPs) and enterprises that depend on ConnectWise Automate for remote monitoring and management of IT assets. Exploitation could lead to unauthorized code execution, data breaches, ransomware deployment, and disruption of critical IT services. The compromise of MSP infrastructure could cascade, affecting multiple client organizations simultaneously, amplifying the impact across sectors such as finance, healthcare, manufacturing, and government. Confidentiality breaches could expose sensitive personal and corporate data, violating GDPR and other data protection regulations, leading to legal and financial penalties. Integrity and availability impacts could disrupt business operations, causing downtime and loss of trust. The risk is heightened in environments where HTTPS enforcement is lax or network segmentation is insufficient, allowing attackers easier access to intercept traffic. Given the criticality of IT management platforms, the vulnerability could be leveraged for persistent footholds within European networks, facilitating advanced persistent threats (APTs) or supply chain attacks.
Mitigation Recommendations
European organizations should immediately upgrade ConnectWise Automate to version 2025.9 or later, where this vulnerability is addressed. Until patching is complete, enforce strict HTTPS usage for all agent-server communications by configuring the product to reject non-TLS connections and verifying server certificates rigorously. Implement network segmentation to isolate management traffic and reduce exposure to on-path attackers. Employ network-level protections such as TLS interception detection and anomaly-based intrusion detection systems to identify suspicious MITM attempts. Regularly audit and monitor ConnectWise Automate logs for unusual file downloads or update behaviors. Consider deploying endpoint detection and response (EDR) solutions capable of detecting unauthorized code execution stemming from malicious file substitutions. Additionally, educate IT staff about the risks of MITM attacks and ensure secure VPN or private network channels for remote management traffic. Finally, maintain a robust incident response plan tailored to supply chain and RMM platform compromises.
Affected Countries
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Technical Details
- Data Version
- 5.1
- Assigner Short Name
- ConnectWise
- Date Reserved
- 2025-10-08T11:26:01.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 68f143fc9f8a5dbaeaf964b5
Added to database: 10/16/2025, 7:14:04 PM
Last enriched: 10/16/2025, 7:29:00 PM
Last updated: 10/19/2025, 11:52:54 AM
Views: 42
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