Command execution via crafted resource URL
Published Feb 14, 2023 · Updated Aug 19, 2026
Command injection in Microsoft Dynamics 365 Unified Service Desk 4.2.0 before 4.2.0.51 allows remote authenticated users to execute code. A crafted URL makes the client call a local file from its Resources directory and execute Windows commands outside the Dynamics application. Exploitation requires low-privilege access, user interaction, and additional preparation of the target environment.
Summary
What happened
Command injection in Microsoft Dynamics 365 Unified Service Desk 4.2.0 before 4.2.0.51 allows remote authenticated users to execute code. A crafted URL makes the client call a local file from its Resources directory and execute Windows commands outside the Dynamics application. Exploitation requires low-privilege access, user interaction, and additional preparation of the target environment.
The record
- CVE
- CVE-2023-21778
- Published
- Feb 14, 2023
- Updated
- Aug 19, 2026
- Vendor
- Microsoft
- Product
- Microsoft Dynamics 365 Unified Service Desk
- Classifications
- CWE-77, T1059, T1204.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 14, 2023CVE publishedPublication date reported by the CVE source.
- Aug 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.2.0 <4.2.0.51
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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