02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: ConnectWiseImproper server-side validation in ScreenConnect extension framework
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.- EPSS probability
- 0.36% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 29.0% of scored records. A rank, not a probability.
- NVD base score
- 9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
SCHEMA: 5.2
- Published
- 2025-12-11 14:21Z8 MO AGO
- Last updated
- 2026-02-26 16:21Z6 MO AGO
- Reserved
- 2025-12-08
- Assigning CNA
- ConnectWise
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.1)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-494Download of Code Without Integrity CheckBase
- Data version
- 5.2
- Document digest
- 8887a8a7e496e3957fdc28e95b19082f2197c2712f9beaba7a5e924ec5ee9db1
05 Affected products
PAIRS: 1VendorProductVersionsPlatforms
SRC: CNA
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-prem:
* ScreenConnect Partners: Please upgrade to ScreenConnect version 25.8 and update
your guest clients to the same version. Visit Download
| ScreenConnect page to download and apply the update (access
requires a valid on-premises license).
* Automate On-Prem Partners with
ScreenConnect Integration:
Partners using an on-premises ScreenConnect installation integrated with Automate must ensure that the Automate ScreenConnect Extension is updated to version 4.4.0.16 before upgrading the ScreenConnect server to version 25.8. Once confirmed, visit the
Automate Product Updates https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates
page to download and apply the ScreenConnect 25.8 update.