CVE-2025-35435 MEDIUM

CVE-2025-35435: CISA Thorium download stream divide by zero

Vendor Cisa

Product Thorium

Weakness CWE-369

Published September 17, 2025

Last update September 30, 2025

View on NVD All CVEs

CVSS base score

4.3/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality None

Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

What the vulnerability does

01Description

CISA Thorium accepts a stream split size of zero then divides by this value. A remote, authenticated attacker could cause the service to crash. Fixed in commit 89101a6.

Key dates

02Disclosure timeline

September 17, 2025 CVE published

September 30, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-35435 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/369.html