CVE-2026-55005
High
Description
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Microsoft Exchange Server
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-122CWE-122
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 |
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