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CVE-2026-20949

Опубликовано: 13 янв. 2026
Источник: msrc
CVSS3: 7.8
EPSS Низкий

Описание

Microsoft Excel Security Feature Bypass Vulnerability

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

FAQ

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

The security feature bypassed is the macro security controls, specifically the setting that disables XL4 macros (Excel 4.0 macros).

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

The user must open the malicious workbook, enable editing, and then click the attacker‑supplied Quick Access Toolbar (QAT) button, which triggers the XL4 macro despite Trust Center protections.

Is the Preview Pane an attack vector for this vulnerability?

No, the Preview Pane is not an attack vector.

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 2021 for 64-bit editions
-
Microsoft Office LTSC 2021 for 32-bit editions
-
Microsoft Office LTSC 2024 for 32-bit editions
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Microsoft Office LTSC 2024 for 64-bit editions
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Microsoft Office LTSC for Mac 2024

Показывать по

Возможность эксплуатации

Publicly Disclosed

No

Exploited

No

Latest Software Release

Exploitation Less Likely

EPSS

Процентиль: 10%
0.00036
Низкий

7.8 High

CVSS3

Связанные уязвимости

CVSS3: 7.8
nvd
21 день назад

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS3: 7.8
github
21 день назад

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS3: 7.8
fstec
22 дня назад

Уязвимость пакетов программ Microsoft Office, Microsoft 365 Apps for Enterprise, связанная с недостатками разграничения доступа, позволяющая нарушителю обойти ограничения безопасности

EPSS

Процентиль: 10%
0.00036
Низкий

7.8 High

CVSS3