How severe is CVE-2025-40765?

CVE-2025-40765 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2025-40765 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40765?

CVE-2025-40765 affects Siemens Telecontrol Server Basic. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40765?

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-2025-40765 have an EU (EUVD) identifier?

Yes. CVE-2025-40765 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34161.

When was CVE-2025-40765 published?

CVE-2025-40765 was published on 2025-10-14 and last updated on 2026-06-17.

CVE-2025-40765

CVE-2025-40765 is a critical-severity vulnerability in Siemens Telecontrol Server Basic with a CVSS 3.x base score of 9.8. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34161
Weakness: CWE-306
Affected product: Siemens Telecontrol Server Basic
Published: 2025-10-14
Last modified: 2026-06-17

Description

A vulnerability has been identified in TeleControl Server Basic V3.1 (All versions >= V3.1.2.2 < V3.1.2.3). The affected application contains an information disclosure vulnerability. This could allow an unauthenticated remote attacker to obtain password hashes of users and to login to and perform authenticated operations of the database service.

Frequently asked questions

What is CVE-2025-40765?: A vulnerability has been identified in TeleControl Server Basic V3.1 (All versions >= V3.1.2.2 < V3.1.2.3). The affected application contains an information disclosure vulnerability. This could allow an unauthenticated remote attacker to obtain password hashes of users and to login to and perform authenticated operations of the database service.
How severe is CVE-2025-40765?: CVE-2025-40765 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2025-40765 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40765?: CVE-2025-40765 affects Siemens Telecontrol Server Basic. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40765?: 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-2025-40765 have an EU (EUVD) identifier?: Yes. CVE-2025-40765 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34161.
When was CVE-2025-40765 published?: CVE-2025-40765 was published on 2025-10-14 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-062309.html

Affected products (1)

cpe:2.3:a:siemens:telecontrol_server_basic:3.1.2.2:*:*:*:*:*:*:*

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