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.
AI summary of the linked source. Not reviewed by an editor. How this works
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The lesson from this incident
Full lessonA 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.
What helps against this
How we list vendors- Phishing-resistant MFA
A stolen password, or a user who taps Approve on a push prompt, is no longer enough to log in.
- Vulnerability scanning and prioritisation
You know which systems are vulnerable, and which ones to fix first.
- Automated patch management
Known holes get closed in days, not months.
Indicators of Compromise
Extracted by AI from the linked source. Not reviewed by an editor. How this works
- cve — CVE-2026-91843