CVE-2026-55009
HIGH
MEDIUM
Priority: 0.20
BB Relevance:
41/100
Published: 2026-07-14
Modified: 2026-10-28
First seen: 2026-10-29
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
Weakness Classification (1)
Affected Software (12)
| Vendor | Product | Version |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | 15.01.0.0 < 15.01.2507.071 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | 15.01.0.0 < 15.01.2507.071 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | 15.02.0.0 < 15.02.1544.043 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | 15.02.0.0 < 15.02.1544.043 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | 15.02.0.0 < 15.02.1748.048 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | 15.02.0.0 < 15.02.1748.048 |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | 15.02.0.0 < 15.02.2562.045 |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | 15.02.0.0 < 15.02.2562.045 |
| microsoft | exchange_server | 2016 |
| microsoft | exchange_server | 2019 |
| microsoft | exchange_server | 2019 |
| microsoft | exchange_server_subscription_edition | < 15.02.2562.045 |
References & Advisories (1)
vendor-advisory
patch