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  4. CVE 2026 3564 screenconnect instance level cryptographic
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Back to active CVEs
Critical · CVSS 9.0CVE-2026-3564

ScreenConnect Instance Level Cryptographic Material ExposureCVE-2026-3564

Answer in brief

CVE-2026-3564 records a Critical severity (CVSS 9.0) vulnerability in ScreenConnect Instance Level Cryptographic Material Exposure. The current sources do not mark it as known exploited. The current feed maps ConnectWise/ScreenConnect (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 17, 2026Updated Jul 9, 2026Source checked Nov 3, 2026First seen by HOL Jul 9, 2026Material review Jul 9, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ConnectWise/ScreenConnect (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ConnectWise/ScreenConnectgenericAll server versions prior to 26.1Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ConnectWise/ScreenConnect.
  2. 2Review the reported fix. Source-reported solution: Cloud: No action is required. ScreenConnect servers hosted in “screenconnect.com” cloud (standalone and Automate/RMM integrated) or “hostedrmm.com” for Automate partners have been updated to remediate the issue.   On-premise ScreenConnect Partners: Please upgrade to ScreenConnect Server version 26.1. Visit Download | ScreenConnect page to download and apply the update (access requires a valid on-premises license).  * If your license is out of maintenance, you must upgrade your license https://docs.connectwise.com/ScreenConnect_Documentation/On-premises/On-premises_licensing/Renew_or_upgrade_an_on-premises_license  before installing the latest supported release of ScreenConnect. * For instructions on updating to the newest release, please reference this doc: Upgrade an on-premise installation - ConnectWise  Automate On-Prem Partners with ScreenConnect Integration: For partners using an on-premises ScreenConnect installation integrated with Automate, ScreenConnect 26.1 is available through the Automate Product Updates https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates page. Link to release notes: ScreenConnect 26.1 / ScreenConnect https://screenconnect.product.connectwise.com/communities/26/topics/5088-screenconnect-261

Evidence timeline and material changes

  1. Published upstream

    Mar 17, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Jul 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jul 9, 2026

Sources and claim methodology

  • Source referenceconnectwise.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-347
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record