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

Patch nowCritical9.9ExploitedEPSS 0.92%

CVE-2026-84869 is a improper privilege management in ConnectWise ScreenConnect, rated critical (9.9 on CVSS 3.1).

Why this priority: Exploited in the wild: listed in CISA's KEV catalog.

Published 8 Sept 2026 · Updated 12 Sept 2026 · NVD status: Analyzed

What it is

The software lets a user or process gain privileges it should not have. An action never checks whether the caller is allowed to perform it.

How it is reached

An attacker can exploit it over the network, with an ordinary user account, and nobody has to click anything.

What an attacker gains

A successful attack can read the data it protects, change data or behaviour and take it offline. In practice, this kind of flaw lets an attacker reach data or actions their role should not allow. The damage can spread past the vulnerable component into others.

Is it being exploited?

CISA added it to the Known Exploited Vulnerabilities catalog on 2026-09-11: it is being exploited in the wild. EPSS estimates a 0.92% chance of exploitation activity in the next 30 days, higher than 61% of scored CVEs.

What to do

Treat it as urgent: it is on CISA's KEV list. CISA's deadline for US federal agencies: 2026-09-14.
Upgrade ConnectWise ScreenConnect to 26.6.5.9742 or later.
Until it is patched, review who holds accounts that can reach it.
Check exposed instances for signs of compromise, not only for the version.

Description from NVD

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: Critical9.9v3.1reporterCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Fixed in: Screenconnect: 26.6.5.9742
CISA KEV: Added 11 Sept 2026; federal due date 14 Sept 2026.CISA’s 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.
EPSS: 0.92% chance of exploitation activity in 30 days; higher than 61% of CVEs (10 Nov 2026).
CISA assessment (SSVC): Exploitation: active · Automatable: no · Technical impact: total
Weaknesses: CWE-269 Improper privilege management
CWE-862 Missing authorization
Affects: ConnectWise ScreenConnect

What this means for your architecture.

A CVE names a product. Whether it matters depends on where that product sits in your systems: what reaches it, which trust boundary it guards and what it can reach once compromised. Veriom maps your components, their relationships and your trust boundaries from your code, cloud and delivery evidence, so you can see where a component like this sits. The radar itself does not look at your systems.

Components it touches

Permission checks in APIs and admin surfaces. The flaw sits between one role or tenant and another.
Multi-tenant services. The flaw sits between one role or tenant and another.

Trust boundaries in play

Authenticated network access. An account is needed, so exposure follows who can sign in: customers, partners or staff.
Isolation between components. The impact crosses out of the vulnerable component into others it should be isolated from.
Between one role or tenant and another. An attacker who crosses it can reach data or actions their role should not allow.

Questions to answer about your own systems

Where does ConnectWise ScreenConnect run in your systems, and at which version?
Which of those instances can be reached from the internet or partner networks?
What can it reach once compromised: which data stores, secrets and services?

See how Veriom maps an architecture Take the interactive tour

Advisories

Sources

CVE records and CVSS scores from the NVD CVE API. This product uses the NVD API but is not endorsed or certified by the NVD.
Exploitation status from CISA’s Known Exploited Vulnerabilities catalog.
Exploit likelihood from FIRST’s Exploit Prediction Scoring System (EPSS), refreshed daily.
Explanations are written by Veriom from fixed templates over each record’s data, not by a person reviewing each CVE. Descriptions are quoted from the records as published.