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

Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2026-09-14 as the remediation due date.

Patch available

What, why and how

ConnectWise ScreenConnect contains both an improper privilege management and missing authorization vulnerability that may allow an attacker to transfer and execute files through an active remote session without authorization or host confirmation.

What

Why

The application reaches a protected operation without first confirming that the requester is authorised.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The application reaches a protected operation without first confirming that the requester is authorised.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2026-09-11.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Missing Authorization → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Network
Privileges required: Low: a basic authenticated account is required
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Changed: exploitation can affect a different security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-862 ↗
CWE-862: Missing Authorization. The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkCWE-862CISA KEV

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-74053Known-exploited evidence recorded

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.

Official EUVD record ↗

BSI · German · WID-SEC-2026-3256ConnectWise ScreenConnect: Schwachstelle ermöglicht Codeausführung

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in ConnectWise ScreenConnect ausnutzen, um Code auszuführen.

Official advisory ↗

Canadian Centre for Cyber Security · English · AV26-903ConnectWise security advisory (AV26-903) – Update 1

As of September 8, 2026, ConnectWise is affected by a vulnerability in the following product: Open-source reporting indicates that CVE-2026-84869 is being exploited in the wild.

Official advisory ↗

CSIRT Italia · Italian · rilevato-sfruttamento-della-cve-2026-84869-relativa-al-prodotto-connectwise-screenconnectRilevato sfruttamento della CVE-2026-84869 relativa al prodotto ConnectWise ScreenConnect

La vulnerabilità identificata tramite la CVE-2026-84869, di tipo "Security Restrictions Bypass", e con CVSS 3.1 pari a 9.9, è dovuta ad una gestione non adeguata dei meccanismi di autorizzazione. Un attaccante remoto con privilegi limitati potrebbe sfruttare tale vulnerabilità al fine di trasferire ed eseguire file nel contesto di una sessione remota attiva senza le necessarie autorizzazioni o la conferma dell'host, permettendo di eludere le misure di sicurezza previste dal prodotto, con possibili impatti sulla riservatezza e sull'integrità dei sistemi interessati.

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-033339ConnectWise, Inc.のscreenconnectにおける複数の脆弱性

ScreenConnectクライアントのある条件により、特定の状況下で、リモートセッションがアクティブな状態でファイルが許可なく、またはホストの確認なしに転送および実行される可能性があります。この問題はScreenConnectサーバーには影響しません。

Official advisory ↗

KISA KrCERT/CC · Korean · KNVD-6953美 CISA 발표 주요 Exploit 정보공유(Update. 2026-09-11)

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: ScreenConnect: All versions prior to 26.6.5
Fixed: 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.
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 8 Sept 2026 · Last source change 12 Sept 2026, 03:55 UTC · CWE-862 · Missing Authorization

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-09-09

European sourceENISA EUVD · EUVD-2026-74053

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceCNA

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

13 Sep 2026, 17:02 UTC
ENISA known-exploited stateENISA EUVD now records this CVE in its known-exploited dataset.
Before
not listed in ENISA EUVD known-exploited dataset
After
listed in ENISA EUVD known-exploited dataset (EUVD-2026-74053)
ENISA EUVD ↗
11 Sep 2026, 03:56 UTC
Vendor guidanceAuthoritative vendor guidance changed: added remediation: connectwise.com/2026-09-08-screenconnect-bulletin; added vendor advisory: connectwise.com/2026-09-08-screenconnect-bulletin; 1 further additions.
Before
no authoritative guidance recorded
After
remediation: connectwise.com/2026-09-08-screenconnect-bulletin · vendor advisory: connectwise.com/2026-09-08-screenconnect-bulletin · vendor advisory: connectwise.com/advisories
connectwise.com ↗
11 Sep 2026, 03:56 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
All versions prior to 26.6.5 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
ScreenConnect: All versions prior to 26.6.5 · Fixed: 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.
CNA ↗
11 Sep 2026, 03:56 UTC
Remediation statusRemediation status changed from Awaiting fix to Patch available.
Before
Awaiting fix
After
Patch available
connectwise.com ↗
11 Sep 2026, 03:56 UTC
CISA KEV stateCISA KEV now confirms exploitation in the wild.
Before
not listed in CISA KEV
After
listed in CISA KEV since 2026-09-11
CISA KEV ↗
9 Sep 2026, 15:04 UTC
ENISA EUVD mappingEUVD-2026-74053 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2026-74053"}
ENISA EUVD ↗
8 Sep 2026, 19:29 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗

2026-09-08CVE published

2026-09-11Added to CISA KEV

2026-09-12Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-74053↗CISA KEV record↗CVE authority or vendor reference↗Vendor advisory↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability

Published severity in operational context

Evidence used

Compensating controls

Verification

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2026-74053

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication