Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 99.2%; technical severity is CVSS 7.8.
A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights. Please see the MSRC Blog Entry for important information about steps you can take to protect your system from this vulnerability.
Who should care
- Teams operating Windows, Windows 10 1507, Windows 10 1607 +14 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Windows, Windows 10 1507, Windows 10 1607 +14 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply updates per vendor instructions.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CWE
- CWE-610
- Affected versions
- Microsoft Windows; Microsoft Windows 10 1507 (End Excluding: 10.0.10240.19325); Microsoft Windows 10 1607 (End Excluding: 10.0.14393.5192); Microsoft Windows 10 1809 (End Excluding: 10.0.17763.3046); Microsoft Windows 10 20h2 (End Excluding: 10.0.19042.1766); Microsoft Windows 10 21h1 (End Excluding: 10.0.19043.1766); Microsoft Windows 10 21h2 (End Excluding: 10.0.19044.1766); Microsoft Windows 11 21h2 (End Excluding: 10.0.22000.739)
- Published
- 1 June 2022
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 99.2%
- Signal calculated at 86