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  4. CVE 2026 84869 screenconnect client guest to host file execution
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Back to active CVEs
Critical · CVSS 9.9Known ExploitedCVE-2026-84869

ScreenConnect Client: Guest-to-Host File Execution via File-Transfer ActionsCVE-2026-84869

Answer in brief

CVE-2026-84869 records a Critical severity (CVSS 9.9) vulnerability in ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions. The current sources 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 Sep 8, 2026Updated Sep 14, 2026Source checked Oct 25, 2026First seen by HOL Sep 8, 2026Material review Sep 14, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.9
Exploitation
Known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.9. Known-exploitation status makes exposure review time-sensitive. 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.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:connectwise:screenconnect:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ConnectWise/ScreenConnectgenericAll versions prior to 26.6.5Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ConnectWise/ScreenConnect.
  2. 2Review the reported fix. Source-reported solution: Cloud: Updated to the latest release. We recommend that partners reinstall their host clients https://docs.connectwise.com/ScreenConnect_Documentation/Get_started/Host_client/Reinstall_the_host_client and update their access agents https://docs.connectwise.com/ScreenConnect_Documentation/Get_started/Host_page/Reinstall_and_upgrade_an_access_agent . On-prem: Upgrade to ScreenConnect client version 26.6.5 or later. Automate-integrated ScreenConnect deployments: Automate partners are eligible to update their integrated on-premises ScreenConnect installation as long as their Automate Assurance subscription is active. Automate partners should apply the ScreenConnect 26.6.5 update through Automate Product Updates.

Evidence timeline and material changes

  1. Published upstream

    Sep 8, 2026

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

  2. Source modified

    Sep 14, 2026

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

  3. First seen by HOL

    Sep 8, 2026

  4. Added to CISA KEV

    Sep 11, 2026

    Evidence: source:kev:kev:kev:record

Sources and claim methodology

  • GitHub security advisorygithub.com
  • CISA Known Exploited Vulnerabilities catalogcisa.gov
  • Source referenceconnectwise.com
  • Source referenceconnectwise.com
  • Source referencehuntress.com
Upstream source description

A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote session without authorization or Host confirmation in certain circumstances. ScreenConnect servers are not impacted.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • aBlocks <= 2.17.0 - Authenticated (Contributor+) Privilege Escalation to 'roleSlug' Block AttributeAlso CWE-269
  • WordPress SureDash plugin <= 1.12.2 - Broken Access Control vulnerabilityAlso CWE-862
  • WordPress UPI QR Code Payment Gateway for WooCommerce plugin <= 1.6.3 - Broken Access Control vulnerabilityAlso CWE-862
  • WordPress WpEvently plugin <= 5.7.8 - Broken Access Control vulnerabilityAlso CWE-862
  • WordPress WP Social Feed Gallery plugin <= 5.0.13 - Broken Access Control vulnerabilityAlso CWE-862
  • FaveoSuite Faveo Helpdesk UnAuthController.php UnAuthController.resolve authorizationAlso CWE-862

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-862, CWE-269
Source
CVE List V5
Source checked
Oct 25, 2026
References
5 linked sources
Open source record