CVE-2025-40807
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: Siemens AG

Description
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to capture-replay of authentication tokens. This could allow an authenticated but already locked-out user to establish still valid user sessions.

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Meta Information

Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-07-06
AI Q&A
2025-12-09
EPSS Evaluated
2026-07-05
NVD
CVE-2025-40807
EUVD
EUVD-2025-201926

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gridscale gridscale_x_prepay 4.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-294 A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

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Executive Summary

This vulnerability in Gridscale X Prepay (all versions before V4.2.1) allows an attacker to perform capture-replay attacks on authentication tokens. Specifically, an authenticated user who has been locked out can still establish valid user sessions by replaying previously captured authentication tokens.

Impact Analysis

The vulnerability can allow a locked-out user to bypass lockout restrictions and establish valid sessions, potentially leading to unauthorized access to the system or user data despite lockout policies.

Mitigation Strategies

To mitigate this vulnerability, you should update Gridscale X Prepay to version 4.2.1 or later as recommended by Siemens. Additionally, ensure multi-level redundant secondary protection schemes are in place, especially if managing critical power systems such as TSOs and DSOs. Protect network access using firewalls, network segmentation, VPNs, and configure your environment according to Siemens operational guidelines. Apply security updates using Siemens-provided tools and documented procedures, validate updates before deployment, and supervise the update process by trained personnel. [1]

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