critical severityConfidence highHistorical record

ScreenConnect guest-to-host file execution (CISA KEV)

Direct answer

ScreenConnect guest-to-host file execution (CISA KEV), also tracked as CVE-2026-84869 / ScreenConnect guest-to-host file execution is a critical-severity threat campaign HOL Guard tracked from Sep 8, 2026 to Sep 11, 2026, verified against 5 primary sources and last reviewed Sep 20, 2026. Active tracking has ended and the record remains published as a permanent historical research record.

ConnectWise ScreenConnect clients before 26.6.5 can, under certain conditions, transfer and execute files through an active remote session without Host confirmation. CISA added CVE-2026-84869 to KEV. Upgrade to 26.6.5 or later and refresh Host clients / access agents.

Also tracked as CVE-2026-84869 · ScreenConnect guest-to-host file execution

First observed
Sep 8, 2026
Last observed
Sep 11, 2026
Last reviewed
Sep 20, 2026
Tracking ended
Sep 11, 2026

Record exports

JSON recordArtifact CSVSTIX 2.1 bundle

Uncertainty and limitations

Read the evidence limits before acting on this record.

Exact session preconditions vary by client build; follow ConnectWise for Host client reinstall requirements beyond the server package bump.

  • ScreenConnect servers are not impacted per vendor; the client path is in scope.
  • CISA KEV listing confirms known exploitation interest; this campaign does not invent exploit details beyond public advisories.
  • HOL blog coverage is operator guidance, not a substitute for the vendor bulletin.

Guard coverage and policy

What Guard's reviewed assertions do and do not claim for this campaign, and the reviewed starting points for defense.

No Guard coverage mapping or campaign-specific policy guidance is published for this record.

Safe next step. Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.

Open policy controlsCampaign-specific emergency policy starting point

Timeline

Reviewed events, oldest first, each tied to a verified source.

  1. Disclosure

    CVE-2026-84869 disclosed for ScreenConnect client guest-to-host file execution.

    Sources:NVD CVE-2026-84869·CVE Record CVE-2026-84869

  2. Update

    CISA listed CVE-2026-84869 in the Known Exploited Vulnerabilities catalog.

    Source:CISA Known Exploited Vulnerabilities Catalog

  3. Update

    HOL Guard published operator blog coverage for CVE-2026-84869.

    Source:HOL Guard operator write-up

Publication clock: 306.9 hours from reviewed disclosure timestamp to HOL publication; 12-hour critical target; historical backfill outside target.

Reviewed artifacts

The specific artifacts this record concerns, as reviewed. Names and versions are shown as text; a registry link is not recorded here.

  • ScreenConnect@<26.6.5connectwisepackage

Sources

Every claim on this record is traceable to the sources below.

Campaign questions, answered

ConnectWise ScreenConnect clients before 5 can, under certain conditions, transfer and execute files through an active remote session without Host confirmation. HOL Guard tracked the campaign from Sep 8, 2026 to Sep 11, 2026.

No. Active tracking ended Sep 11, 2026; this page remains as a labeled historical research record and does not imply the threat is currently active.

The record cites 5 primary sources, names 1 reviewed artifact, and was last fully reviewed Sep 20, 2026 by HOL Guard Security Publishing. Its uncertainty and limitations are stated on the record itself.

Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.

The permalink above is permanent. The full record can be downloaded from this page as JSON, an artifact CSV, and a STIX 2.1 bundle, and corrections can be requested through the published correction path on the record. Exact session preconditions vary by client build; follow ConnectWise for Host client reinstall requirements beyond the server package bump.

Reviewed in full by HOL Guard Security Publishing.

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Record HGTC-2026-8F3BA860