CVE-2026-55005
HIGH
8.8
CVSS 3.1
Metadata
Severity & Metrics
8.8
HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products (4)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | x64-based Systems | 15.01.0.0 < 15.01.2507.071 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | x64-based Systems | 15.02.0.0 < 15.02.1544.043 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | x64-based Systems | 15.02.0.0 < 15.02.1748.048 |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | x64-based Systems | 15.02.0.0 < 15.02.2562.045 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-122 | cna | CWE-122: Heap-based Buffer Overflow |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 8.8 | HIGH | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
References (1)
- Microsoft Exchange Server Remote Code Execution Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55005