CVE-2025-52520: 
Java vulnerability analysis and mitigation

An Integer Overflow vulnerability (CVE-2025-52520) was discovered in Apache Tomcat's multipart upload functionality. The vulnerability affects multiple versions of Apache Tomcat: versions 11.0.0-M1 through 11.0.8, 10.1.0-M1 through 10.1.42, and 9.0.0.M1 through 9.0.106. The issue was disclosed on July 10, 2025, and involves potential bypassing of size limits in certain upload configurations (NVD).

The vulnerability is classified as CWE-190 (Integer Overflow or Wraparound) and has received a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The technical assessment indicates that the vulnerability is network-accessible, requires low attack complexity, and needs no privileges or user interaction to exploit (NVD).

The primary impact of this vulnerability is the potential for Denial of Service (DoS) attacks through the bypassing of size limits in multipart upload configurations. The high availability impact (A:H) in the CVSS score indicates that the vulnerability could significantly affect system availability (NVD, ASEC).

Users are strongly recommended to upgrade to the fixed versions: Apache Tomcat 11.0.9, 10.1.43, or 9.0.107. These versions contain the necessary patches to address the integer overflow vulnerability (NVD, ASEC).