CVE-2026-8670 Details
Description
Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows allows Reusing Session IDs (aka Session Replay). This issue affects Avantra: before 25.3.1.
A vulnerability exists in syslink Software AG Avantra on Linux and Windows platforms, prior to version 25.3.1, due to insufficient session expiration. This flaw allows for session ID reuse, commonly referred to as session replay.
Users are advised to upgrade to version 25.3.1 or above. For those on version 25.1.x or earlier, disable the Web.http-server option in the Avantra Master settings and restart the Master. If on version 25.2.1 through 25.3.0, the Web.http-server toggle is unavailable; instead, firewall port 9058 or redirect the Web.http-port to a blocked port, then restart the Master. Users on version 25.3.1 or above need not take any action.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://support.avantra.com/hc/en-us/articles/5533929912351 | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-613 | Insufficient Session Expiration | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| avantra avantra | < 25.3.1 |
CPE
Remediation
| |
| linux linux kernel | All versions |
CPE
Remediation
| |
| microsoft windows | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 2, 2026 | Initial Analysis | [email protected] |
| May 22, 2026 | New CVE Received | [email protected] |