What is CVE-2026-3873?

CVE-2026-3873 is a high-severity vulnerability in Syslink Software Ag Avantra, classified under Use of Hard-coded Credentials. CVSS score: 7.2/10. Published 2026-03-13.

How severe is CVE-2026-3873?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Syslink Software Ag Avantra

CVE-2026-3873

Use of Hard-coded Credentials vulnerability in Avantra allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Avantra: before 25.3.0.

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Syslink Software Ag Avantra — versions 0

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

vulnerability@ncsc.ch (vendor-advisory)

Frequently asked questions

What is CVE-2026-3873?: CVE-2026-3873 is a high-severity vulnerability in Syslink Software Ag Avantra, classified under Use of Hard-coded Credentials. CVSS score: 7.2/10. Published 2026-03-13.
How severe is CVE-2026-3873?: High severity. CVSS v3 base score is 7.2 out of 10.