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CVE-2026-20854

Опубликовано: 13 янв. 2026
Источник: msrc
CVSS3: 7.5
EPSS Низкий

Описание

Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

FAQ

How could an attacker exploit this vulnerability?

An attacker with the ability to modify certain directory attributes could provide crafted data that causes the system to reference invalid memory during authentication, potentially leading to a crash or other unintended behavior.

According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?

Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to prepare the target environment to improve exploit reliability.

Обновления

ПродуктСтатьяОбновление
Windows 11 Version 24H2 for ARM64-based Systems
Windows 11 Version 24H2 for x64-based Systems
Windows Server 2025
Windows Server 2025 (Server Core installation)
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems

Показывать по

Возможность эксплуатации

Publicly Disclosed

No

Exploited

No

Latest Software Release

Exploitation Less Likely

EPSS

Процентиль: 22%
0.00073
Низкий

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 7.5
nvd
21 день назад

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

CVSS3: 7.5
github
21 день назад

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

CVSS3: 7.5
fstec
22 дня назад

Уязвимость службы Local Security Authority Subsystem Service (LSASS) операционных систем Windows, позволяющая нарушителю выполнить произвольный код

EPSS

Процентиль: 22%
0.00073
Низкий

7.5 High

CVSS3