CVE-2026-27661

Q: How do I fix CVE-2026-27661?

Upgrade sinec security monitor to 4.9.0 or later.

Q: Is CVE-2026-27661 being actively exploited?

Not that we know of. CVE-2026-27661 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.26% is the estimated probability that it will be exploited in the next 30 days. That is higher than 17% of all scored CVEs.

Q: How severe is CVE-2026-27661?

CVE-2026-27661 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-27661 affect?

Published advisories record a fix for sinec security monitor (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.3

CVSS v3

NVD

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`.

CWE-1230

How to fix

Remediation Available

sinec security monitorNVD

Affected:< 4.9.0Fixed in:4.9.0CVE-2026-27661derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.26%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Vendor Advisory1

cert-portal.siemens.com

Related Vulnerabilities

Other CWE-1230 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-1974	Medium	6.5	0.6%	-	Fix
CVE-2024-9447	Medium	6.5	0.6%	-	-
CVE-2024-9099	High	8.1	0.5%	-	-
CVE-2025-0330	High	7.5	0.5%	-	-
CVE-2023-6962	Medium	5.3	0.4%	-	Fix
CVE-2024-47517	Medium	6.8	0.4%	-	-

Common questions

How do I fix CVE-2026-27661?

Upgrade sinec security monitor to 4.9.0 or later.

Is CVE-2026-27661 being actively exploited?

Not that we know of. CVE-2026-27661 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.26% is the estimated probability that it will be exploited in the next 30 days. That is higher than 17% of all scored CVEs.

How severe is CVE-2026-27661?

CVE-2026-27661 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-27661 affect?

Published advisories record a fix for sinec security monitor (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-27661

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-17.