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CVE-2026-45459

Опубликовано: 19 июн. 2026
Источник: msrc
CVSS3: 3.3
EPSS Низкий

Описание

Microsoft Excel Security Feature Bypass Vulnerability

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

FAQ

According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L),but lead to no loss of availability (A:N) and integrity (I:N)? What does that mean for this vulnerability?

An attacker who successfully exploited the vulnerability could view some sensitive information (Confidentiality) but not all resources within the impacted component may be divulged to the attacker. The attacker cannot make changes to disclosed information (Integrity) or limit access to the resource (Availability).

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?

An attacker must send a user a malicious Office file and convince them to open it.

What kind of security feature could be bypassed by successfully exploiting this vulnerability?

Successful exploitation of this vulnerability would allow an attacker to bypass the Office Protected View and open in editing mode rather than protected mode.

Is the Preview Pane an attack vector for this vulnerability?

No, the Preview Pane is not an attack vector.

Are the updates for Microsoft Office LTSC for Mac 2021 and 2024 currently available?

Yes. As of June 16, 2025, the security update for Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac are available. Customers running Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac should ensure the update is installed to be protected from this vulnerability.

Обновления

ПродуктСтатьяОбновление
Microsoft 365 Apps for Enterprise for 32-bit Systems
-
Microsoft 365 Apps for Enterprise for 64-bit Systems
-
Microsoft Office LTSC for Mac 2021
Microsoft Office LTSC 2024 for 32-bit editions
-
Microsoft Office LTSC 2024 for 64-bit editions
-
Microsoft Office LTSC for Mac 2024
Microsoft Office 365 for Mac

Показывать по

Возможность эксплуатации

Publicly Disclosed

No

Exploited

No

Latest Software Release

Exploitation Less Likely

EPSS

Процентиль: 29%
0.00371
Низкий

3.3 Low

CVSS3

Связанные уязвимости

CVSS3: 3.3
nvd
около 2 месяцев назад

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS3: 3.3
github
около 2 месяцев назад

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS3: 3.3
fstec
около 2 месяцев назад

Уязвимость редактора электронных таблиц Microsoft Excel пакетов программ Microsoft Office и Microsoft 365 Apps for Enterprise, связанная с нарушением механизма защиты данных, позволяющая нарушителю обойти ограничения безопасности

EPSS

Процентиль: 29%
0.00371
Низкий

3.3 Low

CVSS3