Nanosystems Supremo for Windows and macOS before 5.0.2.3874 contains an improper certificate validation vulnerability that allows adjacent attackers to intercept TLS connections by presenting untrusted certificates. Attackers on the same network can terminate and relay the client's TLS session using self-signed certificates to read usernames, SHA-256 password hashes, and license codes.

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Nanosystems Supremo unaffected
Version Status Constraints
0 affected < 5.0.2.3874

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://pusi77.eu.org/blog/2026-11-03-supremo-tls-cve cve-icon cve-icon
https://www.supremocontrol.com/ cve-icon cve-icon
https://www.supremocontrol.com/changelog/ cve-icon cve-icon
https://www.vulncheck.com/advisories/nanosystems-supremo-before-5.0.2.3874-improper-tls-certificate-validation cve-icon cve-icon
History

Tue, 03 Nov 2026 23:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 03 Nov 2026 17:30:00 +0000

Type Values Removed Values Added
Description Nanosystems Supremo for Windows and macOS before 5.0.2.3874 contains an improper certificate validation vulnerability that allows adjacent attackers to intercept TLS connections by presenting untrusted certificates. Attackers on the same network can terminate and relay the client's TLS session using self-signed certificates to read usernames, SHA-256 password hashes, and license codes.
Title Nanosystems Supremo before 5.0.2.3874 Improper TLS Certificate Validation
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-03T22:41:14.021Z

Reserved: 2026-11-03T16:57:36.800Z

Link: CVE-2026-121624

cve-icon Vulnrichment

Updated: 2026-11-03T22:36:35.351Z

cve-icon NVD

Status : Received

Published: 2026-11-03T18:17:58.270

Modified: 2026-11-03T23:17:35.730

Link: CVE-2026-121624

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T18:45:14Z

Weaknesses