PatchTheCVECVE-2026-66301: Exposure of sensitive information to an unauthorized actor in Microsoft Dynamics 365 (on-premises) allows an a
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MEDIUM 6.5WATCHLISTUPGRADE
CVE-2026-66301 is a medium-severity flaw (CVSS 6.5) affecting dynamics 365. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Exposure of sensitive information to an unauthorized actor in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to disclose information over a network.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 38%) |
| CISA exploited list | No |
| Weakness | CWE-200 |
| Published | 2026-08-11 |
| Last modified | 2026-10-23 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
microsoft dynamics 365 UPGRADE
Affected: >= 9.1 and < 9.1.47.06
Fixed in: 9.1.47.06
Safe to downgrade to: a release before 9.1
1. Check installed version
apt-cache policy dynamics-365 || rpm -q dynamics-365 || dynamics-365 --version
2. UPGRADE to 9.1.47.06 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade dynamics-365
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade dynamics-365
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 9.1 (Debian / Ubuntu)
apt-cache madison dynamics-365
sudo apt install dynamics-365=<VERSION_BEFORE_9.1>
sudo apt-mark hold dynamics-365
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list dynamics-365
sudo dnf downgrade dynamics-365-<VERSION_BEFORE_9.1>
sudo dnf versionlock add dynamics-365
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-65815 HIGH 8.8 UPGRADE Deserialization of untrusted data in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to exe