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NVD / CVE Program· CNA ConnectWise

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

CriticalCVSS 9.9 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: This week (action score 69/100)

  • CISA has confirmed exploitation in the wild (Sep 11, 2026). Remediation deadline for US federal agencies: Sep 14, 2026.
  • Probability of exploitation in the next 30 days: 0.92% (FIRST EPSS); higher than 60.9% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

Published
Sep 8, 2026
Updated
Sep 12, 2026
EPSS
0.9% · 60th percentile

Report tools

JSON

Action score

69

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.9 / 10
CISA KEV
30 / 30 · Listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · ConnectWise
9.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Sep 11, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Sep 14, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-84869

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
connectwisescreenconnect

Versions reported by the vendor

Affected version ranges reported by the assigning authority (ConnectWise). Independent of NVD's CPE analysis and usually ahead of it.

  • ConnectWise ScreenConnect

    • All versions prior to 26.6.5affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • connectwise screenconnectbefore 26.6.5.9742

Same product

connectwise: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-1709Authentication bypass using an alternate path or channelKEV
    100Now
  • CVE-2024-1708Improper limitation of a pathname to a restricted directory (“path traversal”)KEV
    92Now
  • CVE-2025-3935ScreenConnect Exposure to ASP.NET ViewState Code InjectionKEV
    59Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-14823Dec 18, 2025 · Certificate Signing Extension Returns Encrypted Values
    21Monitor
  • ← EarlierCVE-2026-3564Mar 17, 2026 · ScreenConnect Instance Level Cryptographic Material Exposure
    36Monitor
  • ← EarlierCVE-2026-11596Jun 10, 2026 · In ScreenConnect™ versions prior to 26.2, input validation within the Host Pass creation functionality could allow an authenticated user…
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+2 d
  3. TodayNov 14, 2026+66 d
EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-269 · Improper Privilege Management

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

To simplify setup, a service account is granted broad, cluster-wide permissions. The principle of least privilege is skipped during installation.

The bug in code

The whole CWE-269 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

yaml
kind: ClusterRolerules:  - apiGroups: ["*"]    resources: ["*"]    verbs: ["*"]

Fixed

yaml
kind: Rolemetadata:  namespace: lodos-systemrules:  - apiGroups: ["apps"]    resources: ["deployments"]    verbs: ["get", "list", "update"]

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records