high8.8
CVE-2026-55005
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
Impact
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Exchange Server | Versions 2016, 2019 |
| Microsoft | Exchange Server Subscription Edition | before 15.02.2562.045 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | from 15.01.0.0 before 15.01.2507.071 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | from 15.02.0.0 before 15.02.1544.043 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | from 15.02.0.0 before 15.02.1748.048 |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | from 15.02.0.0 before 15.02.2562.045 |