CVE-2024-1709 | Authentication bypass using an alternate path or channel

Exp

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.

Published: 2024-02-21 Last update: 2026-06-17 Assigner: 9119a7d8-5eab-497f-8521-727c672e3725 Source: 9119a7d8-5eab-497f-8521-727c672e3725
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-1709 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 99.96%, 100th percentile). CISA KEV confirms active exploitation (added 2024-02-22) affecting ConnectWise / ScreenConnect. a weakness (CWE-288) Unauthenticated remote administrative access may be possible. EPSS rose +5.61% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2024-1709

Name: ConnectWise ScreenConnect Authentication Bypass Vulnerability · CISA KEV detail

Exploit added: 2024-02-22

Action due: 2024-02-29

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2024-1709

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-1709

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 94.35% 99.96% +5.61%
2 2026-05-21 94.32% 94.35% +0.03%
3 2025-11-21 — 94.32% —

Full EPSS history (39 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-1709

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 6.0 9119a7d8-5eab-497f-8521-727c672e3725
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 6.0 [email protected]

Weakness enumeration for CVE-2024-1709

Affected software / configurations for CVE-2024-1709

Vendor Product Version Raw CPE
connectwise screenconnect < 23.9.8 cpe:2.3:a:connectwise:screenconnect:*:*:*:*:*:*:*:*

References for CVE-2024-1709

URL Tags
https://github.com/rapid7/metasploit-framework/pull/18870 Issue Tracking Patch Third Party Advisory
https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc Exploit 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-23.9.8 Vendor 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-bypass Exploit Third Party Advisory
https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2 Exploit Third Party Advisory
https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8 Third 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-2024-1709 US Government Resource
cvelogic Threat Intelligence