CVE-2026-3564CRITICAL 9.0EPSS p28.9%

CVE-2026-3564CVE-2026-3564

Description

A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConnect host and guest client agents are not independently affected by this CVE.

Scoring

CVSS 3.19.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.36% probability of exploitation · percentile 28.9% · 2026-08-03T12:00:16Z
Published2026-03-17
Last modified2026-07-09

Underlying weaknesses· 1

CWE-347

References

  1. https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin

1

TypeTargetConfidenceTier
WeaknessImproper Verification of Cryptographic Signaturecwe-3470%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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CVE-2026-0393
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CVE-2026-3999
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ConnectWise ScreenConnect Improper Authentication Vulnerability
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CVE-2026-41086
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CVE-2025-21396
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CVE-2026-11596
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.