# CVE-2026-14950: Frauscher FDS102 insufficient session expiration

Source: https://junglewise.ai/threats/cve-2026-14950-frauscher-fds102-insufficient-session-expiration  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-14950 · Severity: critical · CVSS 9.8 · Published 2026-08-20

Frauscher FDS102 is a diagnostic system used for railway signalling and track management. An attacker with a stolen or leaked session identifier can continue using that session indefinitely after it should have expired, enabling unauthorized access to sensitive railway infrastructure control interfaces and data.

Technologies: [Frauscher Sensortechnik GmbH FDS102](https://junglewise.ai/threats/technologies/fds102). Vendors: [Frauscher Sensortechnik GmbH](https://junglewise.ai/threats/vendors/frauscher-sensortechnik-gmbh).

## Quick answers

**Is CVE-2026-14950 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-14950 being exploited in the wild.

**How severe is CVE-2026-14950?** Critical severity, with a CVSS score of 9.8, published 20 August 2026.

**Which products and versions are affected?** Frauscher Sensortechnik GmbH FDS102 2.0.0 through 2.13.3.

**Is there a fix for CVE-2026-14950?** A patch was published on 2026-08-25: Version 2.14.0 available Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-14950 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-14950?** Check whether you run Frauscher Sensortechnik GmbH FDS102 at an affected version. 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 an insufficient session expiration flaw (CWE-613) in the FDS102 web interface. An unauthenticated attacker in possession of a valid session identifier can continue using the session after its intended expiration time, without needing to re-authenticate. This is a network-reachable attack requiring only a leaked or stolen session token. Successful exploitation enables unauthorized continued access to the FDS web interface and potential access to sensitive railway signalling and track layout information. The vendor has released a patch in version 2.14.0.

## Affected products

- Frauscher Sensortechnik GmbH FDS102 2.0.0 through 2.13.3

## Timeline

- 2026-08-20: disclosed
- 2026-08-25: patched: Version 2.14.0 available

## References

- [https://www.certvde.com/en/advisories/VDE-2026-078/](https://www.certvde.com/en/advisories/VDE-2026-078/)

## Related threats

- [Frauscher FDS102 user enumeration via API endpoint](https://junglewise.ai/threats/cve-2026-14953-frauscher-fds102-user-enumeration-via-api-endpoint)
- [Frauscher FDS102 unauthenticated file disclosure](https://junglewise.ai/threats/cve-2026-14952-frauscher-fds102-unauthenticated-file-disclosure)
- [Frauscher FDS102 Cross-Site Request Forgery in web interface](https://junglewise.ai/threats/cve-2026-14951-frauscher-fds102-cross-site-request-forgery-in-web-interface)
- [Frauscher FDS102 privilege escalation via user creation endpoint](https://junglewise.ai/threats/cve-2026-14949-frauscher-fds102-privilege-escalation-via-user-creation-endpoint)
- [Frauscher FDS102 session hijacking via plaintext log extraction](https://junglewise.ai/threats/cve-2026-14948-frauscher-fds102-session-hijacking-via-plaintext-log-extraction)