CVE-2025-48839 is an out-of-bounds write vulnerability (CWE-787) affecting multiple versions of FortiADC, including 8.0.0, 7.6.0 through 7.6.2, 7.4.0 through 7.4.7, and all versions of 7.2, 7.1, 7.0, and 6.2. This flaw may allow an authenticated attacker with high privileges to execute arbitrary code by sending specially crafted HTTP requests. The vulnerability has a CVSS 3.1 base score of 6.6, indicating a medium severity level. There is no public information about exploits in the wild or available patches at this time.