CVE-2024-1709
ConnectWise ScreenConnect Authentication Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 29 February 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 99.98% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 22 February 2024 · due 29 February 2024 · used in ransomware campaigns
- Weakness
- CWE-288
- Affected
- connectwise/screenconnect
- Source
- 9119a7d8-5eab-497f-8521-727c672e3725
EPSS 100.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8; https://nvd.nist.gov/vuln/detail/CVE-2024-1709
References
- https://github.com/rapid7/metasploit-framework/pull/18870Issue Tracking, Patch, Third Party Advisory
- https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-pocExploit, Third Party Advisory
- https://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/Press/Media Coverage, Third Party Advisory
- https://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/Press/Media Coverage, Third Party Advisory
- https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8Vendor Advisory
- https://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/Third Party Advisory
- https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypassExploit, Third Party Advisory
- https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2Exploit, Third Party Advisory
- https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8Third Party Advisory
- https://www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/Press/Media Coverage, Third Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/18870Issue Tracking, Patch, Third Party Advisory
- https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-pocExploit, Third Party Advisory
- https://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/Press/Media Coverage, Third Party Advisory
- https://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/Press/Media Coverage, Third Party Advisory
- https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8Vendor Advisory
- https://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/Third Party Advisory
- https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypassExploit, Third Party Advisory
- https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2Exploit, Third Party Advisory
- https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8Third Party Advisory
- https://www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/Press/Media Coverage, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-1709US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.