ClosedPatched

ConnectWise ScreenConnect: ScreenConnect Improper Authentication Vulnerability

ConnectWise ScreenConnect

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. Added to CISA KEV on 2025-06-02.

Why this severity: CVSS 8.1 (CNA, v3.1); actively exploited (CISA KEV)

Started: Jun 2, 2025
Closed: Jun 2, 2025
CVE: CVE-2025-3935

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Updated Jun 2, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Jun 2, 2025
CISA added CVE-2025-3935 to the KEV catalog (due 2025-06-23).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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