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CVE record · CVE-2026-77908

Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

CVSS 8.8 HighEPSS 0.0099 · 62nd percentile

Published by the CVE Program (CNA: microsoft) at 8 Sept 2026, 17:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft Dynamics 365 Customer Engagement V9.1
  • affected 9.0 to before 9.1.0048.0004 custom
Identifiers
CVE-2026-77908
CNA
microsoft
Weakness (CWE)
CWE-94
Tags
Published
8 Sept 2026
Updated
10 Nov 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Microsoft Dynamics 365 Customer Engagement V9.1, versions from 9.0 before 9.1.0048.0004, is affected by a code injection flaw. An attacker with valid authorization and network access can execute code on the affected system. The source gives few details, and no workaround is listed; upgrade to 9.1.0048.0004 or later.

Written 11 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.0099, the 62nd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 8 Sept 2026, 17:13 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 16:21 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.