What’s Vulnerable › Vulnerabilities

CVE-2024-1709: ConnectWise ScreenConnect Authentication Bypass Vulnerability

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2024-02-22
• EPSS: 100.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-21 · updated 2026-06-17
• Weakness: CWE-288

Description

ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel vulnerability, which may allow an attacker direct access to confidential information or critical systems.

Affected products

• ConnectWise ScreenConnect: before 23.9.8 — fixed in 23.9.8

How to fix

Upgrade to a fixed version: ConnectWise ScreenConnect 23.9.8. Check the vendor advisory for mitigations.

References

• https://github.com/rapid7/metasploit-framework/pull/18870
• https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc
• https://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/
• https://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/
• https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8
• https://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/
• https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypass
• https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2
• https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8
• https://www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/
• https://github.com/rapid7/metasploit-framework/pull/18870
• https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc

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