Input validation error in ScreenConnect - CVE-2023-47257
Published: November 20, 2023 / Updated: April 21, 2026
Vulnerability identifier: #VU126637
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-47257
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: ConnectWise
Affected software:
ScreenConnect
ScreenConnect
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper input validation in message handling when processing crafted messages. A remote attacker can send crafted messages to execute arbitrary code.
Exploitation requires a man-in-the-middle position.
How to mitigate CVE-2023-47257
Install security update from vendor's website.