CVE-2026-3564ScreenConnect Instance Level Cryptographic Material Exposure
- 9.0CriticalCVSS base score
- 0.40%Exploitation in 30 daysEPSS · top 65% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConnect host and guest client agents are not independently affected by this CVE.
Timeline
ID reserved
By ConnectWise
- 13 days later
· 13 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ConnectWiseCNA (assigner) | 3.1 | Critical9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | Critical9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.0.
Affected products
- affected All server versions prior to 26.1
What to do
Solution: Cloud: No action is required. ScreenConnect servers hosted in “screenconnect.com” cloud (standalone and Automate/RMM integrated) or “hostedrmm.com” for Automate partners have been updated to remediate the issue. On-premise ScreenConnect Partners: Please upgrade to ScreenConnect Server version 26.1. Visit Download | ScreenConnect page to download and apply the update (access requires a valid on-premises license). * If your license is out of maintenance, you must upgrade your license https://docs.connectwise.com/ScreenConnect_Documentation/On-premises/On-premises_licensing/Renew_or_upgrade_an_on-premises_license before installing the latest supported release of ScreenConnect. * For instructions on updating to the newest release, please reference this doc: Upgrade an on-premise installation - ConnectWise Automate On-Prem Partners with ScreenConnect Integration: For partners using an on-premises ScreenConnect installation integrated with Automate, ScreenConnect 26.1 is available through the Automate Product Updates https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates page. Link to release notes: ScreenConnect 26.1 / ScreenConnect https://screenconnect.product.connectwise.com/communities/26/topics/5088-screenconnect-261
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-12574 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-3564)Record last updated .