CVE-2026-84869
Critical9.9CISA KEV — exploited in the wildScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actionstitle from the CVE record
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.
- CVSS
- 9.9v3.1
- EPSS (exploit probability)
- 0.9%61th pct
- CISA KEV
- Listed
EPSS trendFIRST daily scores, last 90 days
Daily values
| Score date | EPSS | Percentile |
|---|---|---|
| 2026-11-12 | 0.9% | 60.9% |
| 2026-11-11 | 0.9% | 60.9% |
| 2026-11-10 | 0.9% | 60.7% |
| 2026-11-09 | 0.9% | 60.7% |
| 2026-11-08 | 0.9% | 60.7% |
| 2026-11-07 | 0.9% | 60.6% |
| 2026-11-06 | 0.9% | 60.6% |
| 2026-11-05 | 0.9% | 60.6% |
| 2026-11-04 | 0.9% | 60.5% |
| 2026-11-03 | 0.9% | 60.5% |
| 2026-11-02 | 0.9% | 60.4% |
| 2026-11-01 | 0.9% | 60.4% |
| 2026-10-31 | 0.9% | 60.4% |
| 2026-10-30 | 0.9% | 60.4% |
| 2026-10-29 | 0.9% | 60.3% |
| 2026-10-28 | 0.9% | 60.3% |
| 2026-10-27 | 0.9% | 60.2% |
| 2026-10-26 | 0.9% | 60.2% |
| 2026-10-25 | 0.9% | 60.2% |
| 2026-10-24 | 0.9% | 60.1% |
| 2026-10-23 | 0.9% | 60.1% |
| 2026-10-22 | 0.9% | 60.1% |
| 2026-10-21 | 0.9% | 60.0% |
| 2026-10-20 | 0.9% | 59.8% |
| 2026-10-19 | 0.9% | 59.8% |
| 2026-10-18 | 0.9% | 59.7% |
| 2026-10-17 | 0.9% | 59.7% |
| 2026-10-16 | 0.9% | 59.7% |
| 2026-10-15 | 0.9% | 59.7% |
| 2026-10-14 | 0.9% | 59.6% |
| 2026-10-13 | 0.9% | 59.4% |
CISA KEV entrycatalogue 2026.11.10
- Date added
- 2026-09-11
- Federal due date
- 2026-09-14
- Known ransomware use
- Unknown
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Verbatim from the CISA KEV catalogue (CISA KEV, fetched 2026-11-12 19:07 UTC). The due date applies to US federal agencies under BOD 22-01.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Learn
Why it happened and what stops it
The weakness (CWE)
How attackers use it (ATT&CK)
Typical for this kind of weakness across CISA KEV exploits (CTID), not specific to this CVE.
How it's exploited
What the attacker gets
Controls that mitigate it (NIST SP 800-53)
- SI-3Malicious Code ProtectionSystem and Information Integrity · mitigates 6 of these techniques
- SI-4System MonitoringSystem and Information Integrity · mitigates 6 of these techniques
- AC-2Account ManagementAccess Control · mitigates 5 of these techniques
- AC-6Least PrivilegeAccess Control · mitigates 5 of these techniques
- CA-7Continuous MonitoringSecurity Assessment and Authorization · mitigates 5 of these techniques
- CM-6Configuration SettingsConfiguration Management · mitigates 5 of these techniques
Affected products
- connectwise screenconnect
Coverage1 article
References
- https://github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869
- https://www.connectwise.com/company/trust/advisories
- https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869
- https://www.huntress.com/blog/rogue-screenconnect-installations