ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
Affects ScreenConnect Client versions prior to 26.6.5; ScreenConnect servers are not affected. Fixed in 26.6.5.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 26.6.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The ScreenConnect client software, used by the guest side of remote support sessions, is affected by this vulnerability. An attacker in an active remote session could potentially transfer and run files on the host's computer without the host's approval or confirmation.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- Record last updated
- CISA remediation deadline
Due date for US federal agencies to patch
Affected versions
- ConnectWise ScreenConnect
All versions prior to 26.6.5
References 3
connectwise.com
GitHub · ConnectWise-Advisories/Disclosures
Questions about CVE-2026-84869
What does this mean?
File-transfer actions can be processed through an active remote session in the ScreenConnect client without proper authorization or Host confirmation. This can allow files to be transferred to and executed on the Host client system, including through elevated execution actions.Source: connectwise.com, github.com
Am I affected, and how do I check?
ScreenConnect versions prior to 26.6.5 are affected. The flaw is in the ScreenConnect client, and servers are not affected, so check the ScreenConnect client version installed on the host system.Source: connectwise.com, github.com
What should I do about it?
Upgrade to ScreenConnect version 26.6.5 or later. Until the update is applied, deselect the TransferFiles permission for each session group role.Source: connectwise.com, github.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-09-11, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data