Review reviewCritical

CVE-2026-8670

syslink software AG Avantra, avantra, linux kernel

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
9.6
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.05.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.6

Vulnerability overview

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.

Affected product and versions

Product
syslink software AG Avantra, avantra, linux kernel
Affected versions
< 25.3.1
Fixed versions
25.3.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that syslink software AG Avantra, avantra, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
CWE-613
CVE-2026-8670 — syslink software AG Avantra, avantra, linux kernel | SECUFOCUS NOW