CVE-2025-40804
CVE-2025-40804 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. 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-732.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- CVSS v4: 9.3
- EPSS exploit prediction: 0% (30th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-27234
- Weakness: CWE-732
- Published:
- Last modified:
Description
A vulnerability has been identified in SIMATIC Virtualization as a Service (SIVaaS) (All versions). The affected application exposes a network share without any authentication. This could allow an attacker to access or alter sensitive data without proper authorization.
Frequently asked questions
- What is CVE-2025-40804?
- A vulnerability has been identified in SIMATIC Virtualization as a Service (SIVaaS) (All versions). The affected application exposes a network share without any authentication. This could allow an attacker to access or alter sensitive data without proper authorization.
- How severe is CVE-2025-40804?
- CVE-2025-40804 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2025-40804 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-40804?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-40804 have an EU (EUVD) identifier?
- Yes. CVE-2025-40804 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27234.
- When was CVE-2025-40804 published?
- CVE-2025-40804 was published on 2025-09-09 and last updated on 2026-06-17.
References
Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities
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