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CRITICAL · 9.6

CVE-2026-8670

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.

Vulnerability 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.

CVSS Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
AvantraAvantra< 25.3.1
LinuxLinux Kernel-
MicrosoftWindows-

Related Weaknesses (CWE)

CWE-613

References

FAQ

What is CVE-2026-8670?

CVE-2026-8670 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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.

How severe is CVE-2026-8670?

CVE-2026-8670 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-8670?

Check the references section above for vendor advisories and patch information. Affected products include: Avantra Avantra, Linux Linux Kernel, Microsoft Windows.