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CVE-2026-45503

Опубликовано: 09 июн. 2026
Источник: msrc
CVSS3: 8.1
EPSS Низкий

Описание

Microsoft Exchange Server Information Disclosure Vulnerability

Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

FAQ

How could an attacker exploit this vulnerability?

An authenticated Outlook Web App user could exploit this issue by reusing a valid access token issued to their own mailbox to access attachments stored in another user’s mailbox within the same Exchange organization, without authorization.

What type of information could be disclosed by this vulnerability?

An attacker could gain unauthorized access to email attachments stored in other users’ mailboxes within the same organization, which may include documents, images, or other files attached to emails.

Обновления

ПродуктСтатьяОбновление
Microsoft Exchange Server 2016 Cumulative Update 23
-
Microsoft Exchange Server 2019 Cumulative Update 14
-
Microsoft Exchange Server 2019 Cumulative Update 15
-
Microsoft Exchange Server Subscription Edition RTM

Показывать по

Возможность эксплуатации

Publicly Disclosed

No

Exploited

No

Latest Software Release

Exploitation Unlikely

EPSS

Процентиль: 37%
0.00445
Низкий

8.1 High

CVSS3

Связанные уязвимости

CVSS3: 8.1
nvd
около 2 месяцев назад

Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

CVSS3: 8.1
github
около 2 месяцев назад

Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

CVSS3: 8.1
fstec
около 2 месяцев назад

Уязвимость почтового сервера Microsoft Exchange Server, связанная с ошибками авторизации, позволяющая нарушителю раскрыть защищаемую информацию

EPSS

Процентиль: 37%
0.00445
Низкий

8.1 High

CVSS3