CVE-2021-35066

Name: CVE-2021-35066
Creator: NVD / NIST
Published: 2021-06-21T20:15:09.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2021-35066 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An XXE vulnerability exists in ConnectWise Automate before 2021.0.6.132.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

An XXE vulnerability exists in ConnectWise Automate before 2021.0.6.132.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Connectwise	Automate	< 2021.0.6.132

References

https://home.connectwise.com/securityBulletin/60cc8c63508a120001cb6e8dPermissions Required, Vendor Advisory
https://www.connectwise.com/company/trust/security-bulletinsVendor Advisory
https://home.connectwise.com/securityBulletin/60cc8c63508a120001cb6e8dPermissions Required, Vendor Advisory
https://www.connectwise.com/company/trust/security-bulletinsVendor Advisory

Timeline

Published: Jun 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35066?

An XXE vulnerability exists in ConnectWise Automate before 2021.0.6.132.

How severe is CVE-2021-35066?

CVE-2021-35066 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35066?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-35066?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST