ThreatCluster

Critical Buffer Overflow Vulnerability in zlib untgz Utility

First seen 12 Jan 2026, 08:57 UTC •GbhackersCybersecuritynewsCyberpress •52

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ThreatCluster

A severe buffer overflow vulnerability has been identified in the zlib untgz utility version 1.3.1.2. This flaw allows attackers to corrupt memory and potentially execute malicious code by supplying specially crafted command-line arguments, specifically within the TGZfname() function that improperly handles user input through an unbounded strcpy() call.

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