CVE-2025-3935
ConnectWise ScreenConnect Improper Authentication Vulnerability
MITRE ATT&CK techniques
How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.
Summary
ConnectWise ScreenConnect contains an improper authentication vulnerability. This vulnerability could allow a ViewState code injection attack, which could allow remote code execution if machine keys are compromised.
Affected software
Vendor: ConnectWise · Product: ScreenConnect
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in ConnectWise
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2024-1709 | ConnectWise ScreenConnect Authentication Bypass Vulnerability | 100.0% | Yes |
| CVE-2024-1708 | ConnectWise ScreenConnect Path Traversal Vulnerability | 95.4% | Yes |
| CVE-2026-84869 | ConnectWise ScreenConnect Improper Privilege Management and Missing Authorizatio | 0.9% | Yes |
Is your domain exposed?
Run a free, instant security report for any domain — exposure score, email auth, TLS and breach metadata.
Get your free reportSources: CISA KEV catalog · NVD · FIRST EPSS · MITRE ATT&CK® · CTID Mappings Explorer
This product uses the NVD API but is not endorsed or certified by the NVD. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.
All information is aggregated from public sources for awareness only and does not constitute an accusation or a security assessment. No personal data or credentials are published.