7.8Alta

CVE-2026-42831Microsoft Office Remote Code Execution Vulnerability

Microsoft Microsoft Office for Android; Microsoft Microsoft Office LTSC for Mac 2021; Microsoft Microsoft Office LTSC for Mac 2024 Publicada: 2026-05-12 19:59 (hace 6 meses)

Descripción

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Debilidad (CWE): CWE-122

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Fabricante	Producto	Versiones
microsoft	365 copilot	< 16.0.19822.20190
Microsoft	Microsoft Office for Android	16.0.1 – < 16.0.19822.20190
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 – < 16.109.26051019
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0 – < 16.109.26051019
microsoft	office	16.0.1 – < 16.0.19822.20190
microsoft	office long term servicing channel	2021
microsoft	office macos 2021	16.0.1 – < 16.109.26051019
microsoft	office macos 2024	16.0.0 – < 16.109.26051019

Referencias y parches

Microsoft Office Remote Code Execution Vulnerability vendor-advisorypatchVendor Advisory

Coincidencias CPE (NVD) (3)

cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:android:*:* < 16.0.19822.20190
cpe:2.3:a:microsoft:office:2024:*:*:*:ltsc:macos:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*

Puntuación CVSS

7.8Alta

Fuente: microsoft · CVSS 3.1

Vector de ataque: Local
Complejidad: Baja
Privilegios: Ninguno
Interacción del usuario: Requerida
Alcance: Sin cambio
Confidencialidad: Alto
Integridad: Alto
Disponibilidad: Alto

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Todas las puntuaciones (2)

cna	CVSS 3.1	7.8Alta
secure@microsoft.com	CVSS 3.1	7.8Alta

EPSS (probabilidad de explotación en 30 días)

0.44%

superior al 38 % de todas las CVE

Evaluación de CISA (SSVC)

Explotación: none
Automatizable: no
Impacto técnico: total

Cronología

ID reservado2026-04-30
Publicada2026-05-12 19:59
Llegó a IP-DB2026-10-24 23:48
Última actualización2026-10-26 03:10

Asignada por (CNA): microsoft
Estado en NVD: Analyzed

Ver en la fuente: CVE.org · NVD

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