CVE-2026-84869
ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
CVE-2026-84869 is a critical vulnerability (CVSS 9.9) in Connectwise Screenconnect, published September 8, 2026. CISA lists it as known to be exploited, since September 11, 2026. EUVD reports exploitation since September 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.17%, the 67th percentile. No source names a fixed version.
- Severity
- 9.9 CriticalCVSS 3.1, CVE List
- Exploit chance
- 1.17%EPSS, 67th percentile
- Exploitation
- ExploitedCISA KEV,
- Fixed in
- No fix listedNo source names one
- Discussion
- 1.8 TrendingBuzz score, 4 people today
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Discussion
SCKit Malware Turns ScreenConnect Support Sessions Into Potential MSP Attack Pathsthehackernews.com ·
Post on Blueskybsky.app ·
Post on Mastodoninfosec.exchange ·
Post on Mastodonmastodon.social ·
Affected products
What each source reports
CVE List Score used
ScreenConnect Client: Guest-to-Host File Execution via File-Transfer Actions
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.
- Record
CVE-2026-84869- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-862, CWE-269
- Updated
- 2026-11-02
EUVDEUVD-2026-74053
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.
- Record
EUVD-2026-74053- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rc8v-f46m-jcgm
A condition in the ScreenConnect client may allow files to be transferred and executed through an...
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.
- Record
GHSA-rc8v-f46m-jcgm- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-269
- Updated
- 2026-11-02
CISA KEVNo score
ConnectWise ScreenConnect Improper Privilege Management and Missing Authorization Vulnerability
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.
- Record
CVE-2026-84869- Weakness
- CWE-269, CWE-862
- Updated
- 2026-11-02
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.
- Record
CVE-2026-84869- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-269, CWE-862
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
connectwise.com/company/trust/security-bulletins/2026-09-08-screenconnect-bulletin
github.com/ConnectWise-Advisories/Disclosures/tree/main/CVE-2026-84869
huntress.com/blog/rogue-screenconnect-installations
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-84869
nvd.nist.gov/vuln/detail/CVE-2026-84869