CVE-2026-77908: Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

highCVSS 8.8CVE-2026-77908

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.8
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77908

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-779080.69% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-77908	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft Dynamics

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEU] [hoch] Microsoft Dynamics 365 und Microsoft Power Automate Desktop: Mehrere Schwachstellencert-bund · 2026-09-09
unknownNCSC-2026-0348 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft Dynamicsncsc-nl · 2026-09-08
highCVE-2026-77908: Improper control of generation of code ('code injection') in Microsoft Dynamics 365 allows an …nvd · 2026-09-08
highCVE-2026-65772: Deserialization of untrusted data in Microsoft Dynamics 365 allows an authorized attacker to e…nvd · 2026-09-08
highCVE-2026-65772: Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerabilitymsrc · 2026-09-08
high[NEW] [high] Microsoft Dynamics: Multiple vulnerabilitiescert-bund · 2026-08-14