Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April announcement. Microsoft is issuing CVE-2025-53786 to document a vulnerability that is addressed by taking the steps documented with the April 18th announcement. Microsoft strongly recommends reading the information, installing the April 2025 (or later) Hot Fix and implementing the changes in your Exchange Server and hybrid environment.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
2 versions affected across 2 products
🚨 CRITICAL: EXCHANGE ONLINE (CVE-2025-53786) One compromised on-prem Exchange admin account can become a full Microsoft 365 tenant takeover. Read more on our website https://cert.gov.ng/advisories/cloud-tenant-takeover-via-microsoft-exchange-hybrid-deployments #Exchange #M365 #CyberSecurity #InfoSec https://t.co/xZovGYOcjE
4 of 4 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | microsoft | exchange_server | 2016 | - | - |
| App | microsoft | exchange_server | 2019 | - | - |
| App | microsoft | exchange_server | 2019 | - | - |
| App | microsoft | exchange_server_subscription_edition | - | - | - |