Authenticated code execution via undisclosed code injection
Published Sep 8, 2026 · Updated Sep 10, 2026
Code injection in Microsoft Dynamics 365 Customer Engagement (on-premises) 9.0 allows remote authenticated users to execute code. Microsoft has not published the affected component or the operation that improperly generates code from attacker-controlled input. Exploitation requires an authorized network user, and the documented consequence is code execution in the affected deployment.
Summary
What happened
Code injection in Microsoft Dynamics 365 Customer Engagement (on-premises) 9.0 allows remote authenticated users to execute code. Microsoft has not published the affected component or the operation that improperly generates code from attacker-controlled input. Exploitation requires an authorized network user, and the documented consequence is code execution in the affected deployment.
The record
- CVE
- CVE-2026-77908
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Dynamics 365 Customer Engagement (on-premises)
- Classifications
- CWE-94, T1059
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 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=9.0 <9.1.0048.0004
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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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