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CVE-2026-84411

CRITICAL CVSS 9.8 View on NVD ↗

Description

The web management service in affected RouterOS versions contains an integer underflow in its HTTP request body handling that is reachable before authentication. This can be leveraged by an unauthenticated network attacker to achieve arbitrary code execution as root, or to cause a denial of service, using a single crafted request.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Oct 02, 2026 23:16 UTC Modified: Oct 02, 2026 23:16 UTC