How severe is CVE-2025-35435?

CVE-2025-35435 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-35435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-35435?

CVE-2025-35435 affects Cisa Thorium. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-35435?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-35435 have an EU (EUVD) identifier?

Yes. CVE-2025-35435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29733.

When was CVE-2025-35435 published?

CVE-2025-35435 was published on 2025-09-17 and last updated on 2026-06-17.

CVE-2025-35435

CVE-2025-35435 is a medium-severity vulnerability in Cisa Thorium with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-369.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29733
Weakness: CWE-369
Affected product: Cisa Thorium
Published: 2025-09-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-35435?: 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.
How severe is CVE-2025-35435?: CVE-2025-35435 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-35435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-35435?: CVE-2025-35435 affects Cisa Thorium. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-35435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-35435 have an EU (EUVD) identifier?: Yes. CVE-2025-35435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29733.
When was CVE-2025-35435 published?: CVE-2025-35435 was published on 2025-09-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisa:thorium:*:*:*:*:*:*:*:*

More vulnerabilities in Cisa Thorium

CVE-2025-35431 — Medium (CVSS 5.4): CISA Thorium does not escape user controlled strings used in LDAP queries. An authenticated remote attacker can modify…
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CVE-2025-35433 — Medium (CVSS 5.0): CISA Thorium does not properly invalidate previously used tokens when resetting passwords. An attacker that possesses a…
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CVE-2025-4637 — High (CVSS 8.7): Divide By Zero vulnerability in davisking dlib allows remote attackers to cause a denial of service via a crafted…
CVE-2026-37232 — High (CVSS 8.6): An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization…
CVE-2024-26945 — High (CVSS 8.4): In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If…

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