CVE Watch16 oct 2026

CVE-2026-103903

An incorrect authorization vulnerability in the WinBox authentication flow of MikroTik RouterOS allows a remote authenticated attacker with

CVSS

8.8

Alto

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Publicado: 12 oct 2026 · Última mod.: 16 oct 2026 · CWE-863

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-10-132026-10-23

Descripción técnica

An incorrect authorization vulnerability in the WinBox authentication flow of MikroTik RouterOS allows a remote authenticated attacker with credentials for a low-privilege account permitted to use WinBox to obtain the authorization policy of a different existing account. The stage-one EC-SRP challenge and proof are verified using the attacker's account, while the independently supplied stage-two username is used to install the target account's privileges. By specifying a higher-privilege account such as admin, a low-privilege user can obtain a full administrative session without knowing the target account's password and can use that session to increase the privileges of the attacker's own account.

Referencias oficiales

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