CVE-2026-27748
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-59
Incorrecta resolución de una ruta antes de aceder a un fichero (Seguimiento de enlaces)
Fecha de publicación:
05/03/2026
Última modificación:
05/03/2026
Descripción
*** Pendiente de traducción *** Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.
Impacto
Puntuación base 4.0
8.50
Gravedad 4.0
ALTA
Puntuación base 3.x
7.80
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://blog.quarkslab.com/avira-deserialize-delete-and-escalate-the-proper-way-to-use-an-av.html
- https://support.avira.com/hc/en-us/articles/360010656158-Current-Avira-versions
- https://www.avira.com/en/internet-security
- https://www.vulncheck.com/advisories/avira-internet-security-arbitrary-file-deletion-via-improper-link-resolution