HIGH

CVE-2025-52520

Apache Tomcat: DoS via integer overflow in multipart file upload

CVSS v3

7.5

HIGH

EPSS Score

2.1 %

exploit probability, as of 2026-09-25

CISA KEV

known exploited

Exploitation

none

SSVC status

Description

For some unlikely configurations of multipart upload, an Integer Overflow vulnerability in Apache Tomcat could lead to a DoS via bypassing of size limits. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11

Technical details

Published: 2025-07-10
Last Modified: 2025-11-04

Frequently asked questions

What is CVE-2025-52520?

Is CVE-2025-52520 actively exploited?

Active exploitation of CVE-2025-52520 has not been confirmed. Its EPSS score was 2.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-52520?

CVE-2025-52520 has a CVSS v3 base score of 7.5 (HIGH severity).

Is CVE-2025-52520 affecting your environment?

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