CVE-2025-35435

CISA Thorium download stream divide by zero

CVSS 5.3 MEDIUMEPSS 0.4%CWE-369

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

17 Sep 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected products

CISA · Thorium

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References

https://github.com/cisagov/thorium/commit/7c94a0b9bc2dc55e0c307360452f348bac06820c https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-259-01.json https://www.cve.org/CVERecord?id=CVE-2025-CVE-2025-35435