How severe is CVE-2026-27661?

CVE-2026-27661 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 low, integrity none, and availability none.

Is CVE-2026-27661 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27661?

CVE-2026-27661 affects Siemens Sinec Security Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27661?

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

Does CVE-2026-27661 have an EU (EUVD) identifier?

Yes. CVE-2026-27661 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10535.

When was CVE-2026-27661 published?

CVE-2026-27661 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-27661

CVE-2026-27661 is a medium-severity vulnerability in Siemens Sinec Security Monitor 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-1230.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10535
Weakness: CWE-1230
Affected product: Siemens Sinec Security Monitor
Published: 2026-03-10
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINEC Security Monitor (All versions < V4.9.0). The affected application leaks confidential information in metadata, and files such as information on contributors and email address, on `SSM Server`.

Frequently asked questions

What is CVE-2026-27661?: A vulnerability has been identified in SINEC Security Monitor (All versions < V4.9.0). The affected application leaks confidential information in metadata, and files such as information on contributors and email address, on `SSM Server`.
How severe is CVE-2026-27661?: CVE-2026-27661 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 low, integrity none, and availability none.
Is CVE-2026-27661 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27661?: CVE-2026-27661 affects Siemens Sinec Security Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27661?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27661 have an EU (EUVD) identifier?: Yes. CVE-2026-27661 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10535.
When was CVE-2026-27661 published?: CVE-2026-27661 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-430425.html

Affected products (1)

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

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