How severe is CVE-2025-40830?

CVE-2025-40830 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-40830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40830?

CVE-2025-40830 affects Siemens Sinec Security Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40830?

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

Does CVE-2025-40830 have an EU (EUVD) identifier?

Yes. CVE-2025-40830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201922.

When was CVE-2025-40830 published?

CVE-2025-40830 was published on 2025-12-09 and last updated on 2026-06-17.

CVE-2025-40830

CVE-2025-40830 is a medium-severity vulnerability in Siemens Sinec Security Monitor with a CVSS 3.x base score of 6.7. 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-285.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v4: 8.4
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201922
Weakness: CWE-285
Affected product: Siemens Sinec Security Monitor
Published: 2025-12-09
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINEC Security Monitor (All versions < V4.10.0). The affected application does not have proper authorization checks for the file_transfer feature in ssmctl-client command. This could allow an authenticated, lowly privileged local attacker to read or write to any file on server or sensor.

Frequently asked questions

What is CVE-2025-40830?: A vulnerability has been identified in SINEC Security Monitor (All versions < V4.10.0). The affected application does not have proper authorization checks for the file_transfer feature in ssmctl-client command. This could allow an authenticated, lowly privileged local attacker to read or write to any file on server or sensor.
How severe is CVE-2025-40830?: CVE-2025-40830 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-40830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40830?: CVE-2025-40830 affects Siemens Sinec Security Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40830?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40830 have an EU (EUVD) identifier?: Yes. CVE-2025-40830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201922.
When was CVE-2025-40830 published?: CVE-2025-40830 was published on 2025-12-09 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-882673.html

Affected products (1)

cpe:2.3:a:siemens:sinec_security_monitor:*:*:*:*:*:*:*:*

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