# CVE-2026-8670: syslink software AG Avantra insufficient session expiration

Source: https://junglewise.ai/threats/cve-2026-8670-syslink-software-ag-avantra-insufficient-session-expiration  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-22. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2026-8670 · Severity: critical · CVSS 9.6 · Published 2026-05-22

Avantra, an AIOps platform for SAP operations management, contains a vulnerability where user login sessions do not expire correctly. This allows an attacker to capture and reuse a valid session ID to impersonate a legitimate user and gain unauthorized access to the system. Such an exploit could lead to full administrative control over the management platform, potentially impacting the availability and integrity of the managed SAP environment.

## Quick answers

**Is CVE-2026-8670 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8670 being exploited in the wild.

**How severe is CVE-2026-8670?** Critical severity, with a CVSS score of 9.6, published 22 May 2026.

**Which products and versions are affected?** syslink software AG Avantra before 25.3.1.

**Is there a fix for CVE-2026-8670?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-8670 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-8670?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is classified as CWE-613 (Insufficient Session Expiration) within the Avantra management software. Due to improper session management, session identifiers remain valid longer than intended or can be reused after they should have expired. A remote, unauthenticated attacker can perform a session replay attack if they obtain a valid session ID (typically requiring some user interaction or interception). Successful exploitation allows the attacker to bypass authentication mechanisms and achieve the same privileges as the hijacked session, which, according to the CVSS vector, can lead to a total compromise of confidentiality, integrity, and availability. The issue is resolved in Avantra version 25.3.1.

## Affected products

- syslink software AG Avantra before 25.3.1

## Timeline

- 2026-05-22: disclosed
- 2026-05-22: advisory
- 2026-06-02: other: NVD analysis updated

## References

- [https://support.avantra.com/hc/en-us/articles/5533929912351](https://support.avantra.com/hc/en-us/articles/5533929912351)