CVE-2026-8670

EUVD-2026-31435
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.6 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 11%
Affected Products (NVD)
VendorProductVersion
avantraavantra
𝑥
< 25.3.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://support.avantra.com/hc/en-us/articles/5533929912351