CVEDB API

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.016

EPSS Ranking 73.5%

CVSS Severity

CVSS v3 Score 7.8

References

Products affected by CVE-2026-55009

Microsoft » Exchange Server » Version: 2016

cpe:2.3:a:microsoft:exchange_server:2016
Microsoft » Exchange Server » Version: 2019

cpe:2.3:a:microsoft:exchange_server:2019
Microsoft » Exchange Server Subscription Edition » Version: N/A

cpe:2.3:a:microsoft:exchange_server_subscription_edition:-
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.017

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.017
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.020

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.020
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.027

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.027
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.029

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.029
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.035

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.035
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.037

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.037
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.041

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.041
Microsoft » Exchange Server Subscription Edition » Version: 15.02.2562.043

cpe:2.3:a:microsoft:exchange_server_subscription_edition:15.02.2562.043