CVE-2026-77908Important
Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
Assessment
Improper control of generation of code ('code injection') in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.
- Severity
- Important
- CVSS base score
- 8.8CVSS:3.1/
AV:N/ AC:L/ PR:L/ UI:N/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Remote Code Execution
- EPSS, next 30 days
- 1.0%Higher than 60.9% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Not assessed
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Microsoft Dynamics 365
- Weakness
- CWE-94: Improper Control of Generation of Code ('Code Injection')
- Issued by
- Microsoft
- Published
- 8 Sep 2026 · September 2026
- Last revised
- 8 Sep 2026
Updates that fix it
1 KB| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5123731 | Security Update | — | Microsoft Dynamics 365 Customer Engagement V9.1 | All CVEs in KB5123731 |
Affected products
Microsoft Dynamics1 affected product
- Microsoft Dynamics 365 Customer Engagement V9.1