Critical GNU InetUtils Vulnerability Allows Unauthenticated Root Access

Critical GNU InetUtils Vulnerability Allows Unauthenticated Root Access

First seen 22 Jan 2026, 02:59 UTC •CybersecuritynewsGbhackers •80% similarity •48.3

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A critical authentication bypass vulnerability in GNU InetUtils' telnetd server has been disclosed, allowing remote attackers to gain root access without credentials. This high-severity flaw affects versions 1.9.3 through 2.7 and is due to improper parameter sanitization in the telnetd authentication mechanism. The vulnerability was reported by a security researcher on January 19, 2026.

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GNU InetUtils Telnetd