CVE-2025-40797
CVE-2025-40797 is a high-severity vulnerability in Siemens Simatic Pcs Neo with a CVSS 3.x base score of 7.5. 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-125.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (38th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-27238
- Weakness: CWE-125
- Affected product: Siemens Simatic Pcs Neo
- Published:
- Last modified:
Description
A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.
Frequently asked questions
- What is CVE-2025-40797?
- A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.
- How severe is CVE-2025-40797?
- CVE-2025-40797 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2025-40797 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-40797?
- CVE-2025-40797 primarily affects Siemens Simatic Pcs Neo. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-40797?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-40797 have an EU (EUVD) identifier?
- Yes. CVE-2025-40797 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27238.
- When was CVE-2025-40797 published?
- CVE-2025-40797 was published on 2025-09-09 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:a:siemens:simatic_pcs_neo:4.1:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_pcs_neo:5.0:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:user_management_component:*:*:*:*:*:*:*:*
More vulnerabilities in Siemens Simatic Pcs Neo
- CVE-2025-40795 — Critical (CVSS 9.8): A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions),…
- CVE-2021-20093 — Critical (CVSS 9.1): A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker…
- CVE-2025-40566 — High (CVSS 8.8): A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions < V4.1 Update 3), SIMATIC PCS neo V5.0 (All…
- CVE-2020-7587 — High (CVSS 8.2): A vulnerability has been identified in Opcenter Execution Discrete (All versions < V3.2), Opcenter Execution Foundation…
- CVE-2023-46098 — High (CVSS 8.0): A vulnerability has been identified in SIMATIC PCS neo (All versions < V4.1). When accessing the Information Server…
- CVE-2025-40798 — High (CVSS 7.5): A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions),…
All CVEs affecting Siemens Simatic Pcs Neo →
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