CVE-1999-0778

CVE-1999-0778 describes a buffer overflow vulnerability in Xi Graphics Accelerated-X server versions 4.0.x and 5.0. A local attacker can exploit this flaw by providing an excessively long display or query parameter, leading to root privilege escalation. With a CVSS score of 7.2 (HIGH), this vulnerability is easily exploitable locally with low attack complexity, resulting in complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog or showing active exploitation, public exploit code exists on ExploitDB, though there is no evidence of broader community discussion or media coverage.