What is CVE-2026-77908?

CVE-2026-77908 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Code Injection. CVSS score: 8.8/10. Published 2026-09-08.

How severe is CVE-2026-77908?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Microsoft Dynamics 365

CVE-2026-77908

Improper control of generation of code ('code injection') in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-09-08 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.1th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-94 — Code Injection

References

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-77908?: CVE-2026-77908 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Code Injection. CVSS score: 8.8/10. Published 2026-09-08.
How severe is CVE-2026-77908?: High severity. CVSS v3 base score is 8.8 out of 10.