Patch tracker / CVE reference / CVE-2025-59248
CVE-2025-59248
CVE-2025-59248 is a high severity Microsoft vulnerability with a CVSS score of 8.8. Microsoft has shipped the fix: deploy one of the 4 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
High severity Microsoft vulnerability, CVSS 8.8. Fixed by 4 Microsoft security updates.
Risk summary
Senserva AI Opinion for CVE-2025-59248
A spoofing flaw in Microsoft Exchange Server, rated High Severity at CVSS 8.8, covering Subscription Edition RTM, 2019 CU15, and 2016 CU23. Spoofing at the mail server layer is a phishing force multiplier: messages can carry trust signals they have not earned, and users have little chance of spotting the difference. Exploit probability is just 1 percent, but Exchange flaws draw disproportionate attacker attention regardless of the initial numbers.
Do this: Apply the Exchange security update across all your on-premises servers and Subscription Edition installs in one coordinated pass.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-59248
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Updated August 7, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Full tracking and change history for CVE-2025-59248
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Exploitation and severity
Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 8.8 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
Official patch(es) for CVE-2025-59248
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5066366, KB5066367, KB5066368, KB5066369 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2025-59248. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Affected products
Fixed by the same updates
If you are patching CVE-2025-59248, the same updates also fix these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.