{"id":"CVE-2026-84869","kind":"vulnerability","aliases":["CVE-2026-84869"],"related":[],"title":"connectwise screenconnect: A condition in the ScreenConnect client may allow files to be transferred and executed through an active remote…","description":"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.\n\nCISA 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.","summary":"ScreenConnect client-side missing authorization (CVSS 9.9): files can be transferred and executed on the Host machine through an active session without Host confirmation, including elevated execution. Servers are not impacted. Affects Support and Access sessions, Cloud and On-Premise. Exploited in the wild (CISA KEV 2026-09-11). ConnectWise-hosted cloud servers are already updated, but host clients and access agents should be reinstalled or updated.","severity":"critical","cvss":9.9,"epss":null,"exploited":true,"exploited_at":"2026-09-11T00:00:00+00:00","products":[{"name":"ConnectWise ScreenConnect","fixed":["26.6.5"],"affected":"< 26.6.5","ecosystem":"vendor"},{"name":"connectwise screenconnect","fixed":["26.6.5.9742"],"affected":"< 26.6.5.9742","ecosystem":"vendor"},{"name":"ConnectWise ScreenConnect","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["connectwise","exploited","msp","remote-access","screenconnect","self-hosted","vendor"],"not_affected_if":["managed-hosting"],"how_to_check":"On-premise: check the ScreenConnect server version in Administration > Status or the product version; anything below 26.6.5 is affected. Cloud: reinstall host clients and access agents per ConnectWise docs. Check Administration > Security > Roles for which roles still have TransferFiles.","fix":"On-premise: upgrade to ScreenConnect 26.6.5 or later (Automate-integrated: via Automate Product Updates; the license must be in maintenance). Temporary mitigation: in Administration > Security > Roles, remove the TransferFiles permission from every session group in every role. Cloud: no server action, but update host clients and access agents.","status":"open","published_at":"2026-09-08T20:18:51+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:31:31+00:00","updated_at":"2026-10-24T00:09:50+00:00","category":"vendor","confidence":0.85,"triage":{"at":"2026-10-23T20:31:31Z","model":"claude-haiku-5-5","output":{"fix":"Apply the ConnectWise vendor mitigations or patch for CVE-2026-84869; if no mitigation is available, discontinue use of the product per CISA guidance. Affected and fixed versions are unknown from the sources.","summary":"ConnectWise ScreenConnect has a privilege management and missing authorization flaw that lets an attacker transfer and execute files through an active remote session without authorization or confirmation from the host. CISA lists it as exploited in the wild.","category":"vendor","who_cares":["screenconnect","connectwise","self-hosted","msp"],"confidence":0.7,"analyst_note":"Find affected and fixed ScreenConnect versions and the vendor advisory from ConnectWise, and check whether ConnectWise-hosted instances are covered.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"severity_if_unknown":"critical"},"cost_usd":0.000383,"input_tokens":2230,"output_tokens":320,"severity_before":"unknown"},"analyst_status":"done","analyst_note":"Find affected and fixed ScreenConnect versions and the vendor advisory from ConnectWise, and check whether ConnectWise-hosted instances are covered.","search":"'-04':163C,189C,220C '-09':93B '-11':94B '-2026':22A,25A '-84869':23A,26A '2026':92B '26':162C,188C,219C '9.9':51B 'access':38B,79B,107B 'accord':152C 'action':148C 'activ':19A,64B,138C 'adher':216C 'affect':76B 'agent':108B 'allow':10A,128C 'alreadi':101B 'appli':149C 'applic':186C 'asset':210C 'attack':130C 'author':49B,124C,142C 'base':167C 'bod':161C,187C,218C 'cisa':90B,146C,159C,176C 'client':8A,46B,105B 'client-sid':45B 'cloud':81B,98B,192C 'complianc':157C 'condit':4A 'confirm':68B,145C 'connectwis':1A,33B,96B,114C 'connectwise':27A,29A,31A 'connectwise-host':95B 'contain':116C 'cve':21A,24A 'cvss':50B 'discontinu':195C 'elev':70B 'ensur':156C,215C 'evalu':208C 'execut':16A,57B,71B,134C 'exploit':34B,86B 'exposur':213C 'file':11A,52B,135C 'follow':185C 'forens':178C 'guidanc':174C,190C 'guidelin':222C 'host':42B,60B,67B,97B,104B,144C 'impact':75B 'improp':119C 'includ':69B 'instruct':155C 'internet':212C 'kev':91B 'machin':61B 'manag':121C 'may':9A,127C 'miss':48B,123C 'mitig':150C,201C 'msp':35B 'note':173C,184C 'on-premis':83B 'patch':221C 'premis':85B 'priorit':164C 'privileg':120C 'product':199C 'reinstal':111B 'remot':20A,37B,139C 'remote-access':36B 'requir':147C,180C 'respons':206C 'risk':169C 'screenconnect':2A,7A,28A,30A,32A,39B,44B,115C 'secur':165C 'see':170C,181C 'self':41B 'self-host':40B 'server':72B,99B 'servic':193C 'session':65B,80B,140C 'side':47B 'stakehold':204C 'support':77B 'transfer':14A,55B,132C 'triag':179C 'unavail':203C 'updat':102B,113B,166C 'url':171C,182C 'use':196C 'vendor':43B,154C 'vulner':125C 'wild':89B 'without':66B,141C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-09-08T20:18:51+00:00","kev":{"dateAdded":"2026-09-11","dueDate":"2026-09-14","requiredAction":"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.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_by":"7d616e1a-3288-43b1-a0dd-0a65d3e70a49","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-84869","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-84869","severity":null,"published_at":"2026-09-11T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T11:39:13+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-84869:85","url":null,"severity":null,"published_at":"2026-10-23T21:28:56+00:00","modified_at":"2026-10-23T21:28:56+00:00","first_seen_at":"2026-10-23T21:28:56+00:00","fetched_at":"2026-10-23T21:28:56+00:00","note":"ConnectWise disclosure+bulletin (2026-09-08): client-side flaw, all versions <26.6.5 affected, fixed in 26.6.5; cloud already patched; servers not impacted. KEV-listed (Cyber Centre). No public PoC found (not searched deeply). Armis cites client build 26.6.5.9742, not confirmed on vendor page."},{"source":"nvd","external_id":"CVE-2026-84869","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84869","severity":null,"published_at":"2026-09-08T20:18:51+00:00","modified_at":"2026-09-12T04:16:42+00:00","first_seen_at":"2026-10-23T23:44:52+00:00","fetched_at":"2026-10-23T23:44:52+00:00","note":null}],"documents":[{"id":1029,"url":"https://raw.githubusercontent.com/ConnectWise-Advisories/Disclosures/main/CVE-2026-84869/README.md","title":"ConnectWise disclosure CVE-2026-84869","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":1031,"url":"https://www.connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin","title":"ConnectWise 2026-09-08 ScreenConnect Bulletin (26.6.5)","kind":"vendor","source":"analyst","text":null,"published_at":null,"relation":"fix","confidence":null,"note":null},{"id":1032,"url":"https://www.cyber.gc.ca/en/alerts-advisories/connectwise-security-advisory-av26-903","title":"Cyber Centre AV26-903","kind":"other","source":"analyst","text":null,"published_at":null,"relation":"mentions","confidence":null,"note":null}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}