CVE-2020-5209

CVE-2020-5209 is a high-severity buffer overflow vulnerability affecting NetHack versions prior to 3.6.5. This flaw allows for potential remote code execution or privilege escalation, particularly on systems where NetHack is installed with suid/sgid permissions or shared systems where users can manipulate command-line options. The vulnerability has a CVSS score of 7.8, indicating a high impact on confidentiality, integrity, and availability, with a low attack complexity. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.