CVE-2026-121624
Nanosystems Supremo before 5.0.2.3874 Improper TLS Certificate Validation
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Supremo Nanosystems |
≥ 0; < 5.0.2.3874 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.6 high |
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 | CNA: VulnCheck |
| 3.1 / 6.8 medium |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA: VulnCheck |
| 4.0 / 7.6 high |
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 6.8 medium |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://pusi77.eu.org/blog/2026-11-03-supremo-tls-cveCNA: VulnCheck · technical-description
- https://www.supremocontrol.com/changelog/CNA: VulnCheck · release-notes
- https://www.supremocontrol.com/CNA: VulnCheck · product
- https://www.vulncheck.com/advisories/nanosystems-supremo-before-5.0.2.3874-improper-tls-certificate-validationCNA: VulnCheck · third-party-advisory
- https://pusi77.eu.org/blog/2026-11-03-supremo-tls-cve[email protected]
- https://www.supremocontrol.com/[email protected]
- https://www.supremocontrol.com/changelog/[email protected]
- https://www.vulncheck.com/advisories/nanosystems-supremo-before-5.0.2.3874-improper-tls-certificate-validation[email protected]
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