---
title: "CVE-2026-84869: ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-84869/
description: "CVE-2026-84869 (ConnectWise ScreenConnect): Exploited in the wild (CISA KEV). A condition in the ScreenConnect client may allow files to be transferred and…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-08
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-84869"
kev: true
cvss: 9.9
epss: 0.00924
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-84869: ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run ConnectWise ScreenConnect. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-09-11, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-09-14 ; treat that as the outer limit, not the target.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Editorial verdict: Act now. ScreenConnect CVE-2026-84869: Guest-to-Host File Execution — If your technicians use a ScreenConnect client older than 26.6.5, a compromised machine they connect to can run code on theirs; upgrade on-premises servers and reinstall host clients now.

## What it is

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.

## Affected products (CVE record)

- ConnectWise ScreenConnect: All versions prior to 26.6.5

## Severity

- ConnectWise CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-09-11; federal due date 2026-09-14. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.92% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [Listed in CISA KEV notes (connectwise.com)](https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin)
- [CVE.org record CVE-2026-84869](https://www.cve.org/CVERecord?id=CVE-2026-84869)
- [NVD entry CVE-2026-84869](https://nvd.nist.gov/vuln/detail/CVE-2026-84869)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)
- [github.com](https://github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869)
- [connectwise.com](https://www.connectwise.com/company/trust/advisories)
- [huntress.com](https://www.huntress.com/blog/rogue-screenconnect-installations)

---
Source page: https://erroneo.us/security/cve/CVE-2026-84869/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt