Quick answers
- Is CVE-2026-42898 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42898 being exploited in the wild.
- How severe is CVE-2026-42898?
- Critical severity, with a CVSS score of 9.9, published 12 May 2026.
- Which products and versions are affected?
- Microsoft Dynamics 365 (on-premises).
- Is there a fix for CVE-2026-42898?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-42898 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-42898?
- Check whether you run Microsoft Dynamics 365 (on-premises). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A code injection vulnerability (CWE-94) exists in Microsoft Dynamics 365 (on-premises) due to improper control of the generation of code. An attacker with low-privileged credentials can exploit this flaw over a network without user interaction. Successful exploitation allows for arbitrary code execution with a 'Changed' scope (S:C), meaning the attacker can potentially impact components beyond the Dynamics 365 application itself. Microsoft has released security updates to address this issue; administrators should refer to the Microsoft Security Update Guide for specific patch details.
Affected products
- Microsoft Dynamics 365 (on-premises)
Timeline
- 2026-05-12: disclosed
- 2026-05-12: advisory