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Vulnerability record · CVE-2026-8673 · published 22 May 2026

CVE-2026-8673: Avantra vulnerability

Avantra · Avantra

Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks. This issue affects Avantra: before 25.3.0.

9.1 CVSS 3.1 Critical EPSS 0.33% · top 75.8% CWE-523 · CWE-523
9.1CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
23 Jul 2026Last modified by NVD

Description

Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks. This issue affects Avantra: before 25.3.0.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.avantra.com/hc/en-us/articles/5535621927071 MitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.6CVE-2026-8670Avantra insufficient session expiration vulnerabilityInsufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows allows Reusing Session IDs (aka Session Replay). This …EPSS 0.40%7.5CVE-2026-8671Avantra sensitive information in log file vulnerabilityInsertion of sensitive information into log file vulnerability in syslink software AG Avantra on Linux, Windows allows Resource Leak Exposure. This i…EPSS 0.41%5.1CVE-2026-8672Avantra vulnerabilityUse of default password vulnerability in syslink software AG Avantra on Linux, Windows allows Try Common or Default Usernames and Passwords. This iss…EPSS 0.15%

Source: NIST National Vulnerability Database (record CVE-2026-8673), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.