ConnectWise · ScreenConnect
CVE-2024-1709
Authentication bypass using an alternate path or channel
What it is
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.
CISA: ConnectWise ScreenConnect contains an authentication bypass vulnerability that allows an attacker with network access to the management interface to create a new, administrator-level account on affected devices.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: February 29, 2024
- Added to the CISA list
- February 22, 2024
- Published
- February 21, 2024
- Severity
- Critical 10.0 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- >99.9% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-288
- More details
- NVD · CVE.org · CISA
All references (10)
- https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8
- https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8
- https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2
- https://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-f…
- https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc
- https://github.com/rapid7/metasploit-framework/pull/18870
- https://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/
- https://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-…
- https://www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/
- https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypass
More exploited flaws from ConnectWise
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 11, 2026 | Improper Privilege Management and Missing Authorization | ScreenConnect | Critical 9.9 | 0.9% |
| Apr 28, 2026 | Path Traversal | ScreenConnect | High 8.4 | 95% |
| Jun 2, 2025 | Improper Authentication | ScreenConnect | High 8.1 | 3.6% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.