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VulnerabilitiesSep 17, 2026

Critical Check Point Management Flaw Lets Unauthenticated Attackers Run Code as Root

Critical Check Point flaw allows unauthenticated root code execution over the network.

A critical vulnerability (CVE-2026-91843) in Check Point's Security Management and Log Servers allows unauthenticated attackers to run code as root over the network. The flaw, a stack overflow in the login process, is triggered by a long username and has a CVSS score of 9.8. Check Point has released a fix via its LivePatch update channel and has no indication of exploitation.

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The lesson from this incident

Full lesson

A stack overflow vulnerability in Check Point's Security Management and Log Servers allows unauthenticated remote attackers to execute arbitrary code as root simply by submitting an overly long username during the login process — no credentials required. With a CVSS score of 9.8, this flaw represents a near-worst-case scenario: complete system compromise of the very infrastructure responsible for managing an organization's security controls. If exploited, an attacker could gain full control over firewall policies, log data, and network segmentation rules, effectively nullifying an organization's entire defensive posture. This incident underscores that security management platforms are high-value targets and must be treated as critical infrastructure with the fastest possible patch cycles and the strictest access restrictions.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • cve — CVE-2026-91843

Entities

Check Point (vendor)Security Management Server (product)Log Server (product)SmartConsole (product)Smart-1 Cloud (product)LivePatch (technology)