---
title: "CVE-2024-1709: ConnectWise ScreenConnect Authentication Bypass Vulnerability"
url: https://erroneo.us/security/cve/CVE-2024-1709/
description: "CVE-2024-1709 (ConnectWise ScreenConnect): Exploited in the wild (CISA KEV). ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-02-21
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-1709"
kev: true
cvss: 10
epss: 0.9998
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-1709: ConnectWise ScreenConnect Authentication Bypass Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run ConnectWise ScreenConnect. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-02-22, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-02-29 ; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns .
- EPSS 100.0% , percentile 100.0: FIRST’s model estimates a 100.0% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. ScreenConnect Auth Bypass CVE-2024-1709 (CVSS 10) — Any on-premises ScreenConnect server still below 23.9.8 should be treated as compromised until proven otherwise; cloud-hosted customers were patched by ConnectWise.

## 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.

## Affected products (CVE record)

- ConnectWise ScreenConnect: <= 23.9.7

## Severity

- cisa-cg CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2024-02-22; federal due date 2024-02-29. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 99.98% probability of exploitation activity in the next 30 days; percentile 100.0.

## Sources

- [Listed in CISA KEV notes (connectwise.com)](https://www.connectwise.com/company/trust/security-bulletins/connectwise-screenconnect-23.9.8)
- [CVE.org record CVE-2024-1709](https://www.cve.org/CVERecord?id=CVE-2024-1709)
- [NVD entry CVE-2024-1709](https://nvd.nist.gov/vuln/detail/CVE-2024-1709)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-1709)
- [huntress.com](https://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8)
- [huntress.com](https://www.huntress.com/blog/detection-guidance-for-connectwise-cwe-288-2)
- [bleepingcomputer.com](https://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/)
- [github.com](https://github.com/watchtowrlabs/connectwise-screenconnect_auth-bypass-add-user-poc)
- [github.com](https://github.com/rapid7/metasploit-framework/pull/18870)
- [horizon3.ai](https://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/)
- [techcrunch.com](https://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/)
- [securityweek.com](https://www.securityweek.com/connectwise-confirms-screenconnect-flaw-under-active-exploitation/)
- [huntress.com](https://www.huntress.com/blog/a-catastrophe-for-control-understanding-the-screenconnect-authentication-bypass)

---
Source page: https://erroneo.us/security/cve/CVE-2024-1709/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt