CVE-2026-55006
High
Description
Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Exchange Server
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-1220CWE-1220
How to fix
Update
- microsoft exchange_server_subscription_edition15.02.2562.045 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft exchange_server | 2016, 2019 | — |
| microsoft exchange_server_subscription_edition | v < 15.02.2562.045 | 15.02.2562.045 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.