Vulnerability in Nanosystems Supremo
CVE-2026-121624
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- pusi77.eu.org/blog/2026-11-03-supremo-tls-cve (technical-description)
- www.supremocontrol.com/changelog/ (release-notes)
- www.supremocontrol.com/ (product)
- www.vulncheck.com/advisories/nanosystems-supremo-before-5.0.2.3874-improper-tls… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121624?
- CVE-2026-121624 is a medium-severity vulnerability in Nanosystems Supremo, classified under Improper Certificate Validation. CVSS score: 6.8/10. Published 2026-11-03.
- How severe is CVE-2026-121624?
- Medium severity. CVSS v3 base score is 6.8 out of 10.