CVE-2024-1709
CriticalExploitedPublic exploitConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel
Published Feb 21, 2024 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2024-1709 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting ScreenConnect (Connectwise).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 20, 2024 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including ScreenConnect 23.9.8.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2024-1709 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 22, 2024 | Feb 29, 2024 | Known |
| Industry KEV feed | Feb 20, 2024 | Feb 29, 2024 | Known |
| CIRCL KEV | Feb 21, 2024 | Feb 29, 2024 | Known |
| ENISA EUVD | Feb 22, 2024 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ScreenConnectConnectwise | See advisory | 23.9.8 |
Patched Releases
ScreenConnect
23.9.8
Timeline
Added to Industry KEV feed
Feb 20, 2024
Publicly disclosed
Feb 21, 2024
Added to CIRCL KEV
Feb 21, 2024
Added to CISA KEV
Feb 22, 2024
Added to ENISA EUVD
Feb 22, 2024
Last updated
Feb 26, 2026
Weakness Type
- CWE-288 Authentication Bypass Using an Alternate Path or Channel
References
- advisoryhttps://techcrunch.com/2024/02/21/researchers-warn-high-risk-connectwise-flaw-under-attack-is-embarrassingly-easy-to-exploit/
- advisoryhttps://www.bleepingcomputer.com/news/security/connectwise-urges-screenconnect-admins-to-patch-critical-rce-flaw/
- advisoryVulnCheck exploitation report
- advisoryhttps://www.horizon3.ai/attack-research/red-team/connectwise-screenconnect-auth-bypass-deep-dive/
- advisoryhttps://www.huntress.com/blog/vulnerability-reproduced-immediately-patch-screenconnect-23-9-8
FAQ
Common Questions.
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: ScreenConnect (Connectwise). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 20, 2024 and is known to be used in ransomware campaigns.
Yes. It was added on Feb 22, 2024 with a federal remediation due date of Feb 29, 2024.
Public exploit code is available.
Fixed versions are available, including ScreenConnect 23.9.8.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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